The study aims to establish an integrated generic investigation process that could be utilised by Commercial Forensic Practitioners in South Africa. Secondly, it aims to determine which investigation processes are currently being utilised in South African forensics practices. An overview is given of the international utilised processes and a basic framework was developed, presented and tested by means of questionnaires to members of the Institute of Commercial Forensic Practitioners in South Africa. The development of an investigation process for Commercial Forensic Practitioners in South Africa could be utilised by the Institute of Commercial Forensic Practitioners to provide a governance structure for the Institute that would enhance the quality of forensic investigations and contribute to the successful investigation and prosecution of commercial crime in South Africa. To achieve the study objective, an empirical study was conducted among current members of the Institute of Commercial Forensic Practitioners in South Africa through the circulation of questionnaires via their website. These results were interpreted, taking cognisance of international practices identified in the literature review. A formalised investigation process was developed and suggested to the Institute of Commercial Forensic Practitioners. Statisticians were involved during the process of designing the questionnaires, and analysing and interpreting the results. The research dealt with a generic investigation process for Commercial Forensic Practitioners. It also dealt with its implementation and investigative performance in South African practices. In this study, an overview of the investigation process for Commercial Forensic Practitioners in South Africa was discussed. The research also analysed the following: * The time period in which organisations implemented the Commercial Forensic Practitioners Process; * The effect of the Commercial Forensic Practitioners Process on investigative performance; and * The integration of the Commercial Forensic Practitioner's process into the budgeting process. The findings of the study revealed the following: * Each of the phases of the Commercial Forensic Practitioners Process is as important as the others in matters that will be presented before court. * An investigation should only be performed if it can be performed properly and in a manner that provides clarity and value to the engagement and its objectives. For this purpose, a Commercial Forensic Practitioner should only accept an assignment if free of conflicts and any independence issues. It is imperative for Commercial Forensic Practitioners to adequately assess not only their relationship to the client and the particular engagement, but also their relationship to any opposing party. This assessment should be done in the context of all other work of the practice, not only that work that is performed by the particular Commercial Forensic Practitioner and direct colleagues. * The Commercial Forensic Practitioner must design, implement and use a robust client and engagement acceptance process that is documented, standardised and, where relevant, agreed with the client. * The role of a Commercial Forensic Practitioner in an investigation process is, therefore, to gather evidence, interrogate and examine the financial evidence, develop computer applications that help in analysing and presenting the evidence, putting forward all the findings in the form of reports, exhibits and documents, and finally taking part in civil actions or litigation as an expert witness, and testifying to the court and presenting all the evidence obtained through documentation or visual aids. It is therefore of the essence that a Commercial Forensic Practitioner be well versed in financial issues and legal concepts and proceedings. * The study found that the majority of respondents (69.3%) were male, while only 30.7% were female. The majority of Commercial Forensic Practitioners fall within two age categories, namely, 35 to 44 and 45 to 54 years. These age categories fall into the productive stage of a working career in the human life-cycle. It is furthermore inferred that the level of experience is of importance, as the majority of participants were well experienced, mostly with at least ten years‟ experience. * A total of 22.7% of respondents indicated that they do not use a formalised investigation process. The majority of respondents (77.3%) thus make use of a formalised investigation process. * The study found that formalised investigation processes are not implemented for the following reasons: -- Managerial and governance processes within practices were sufficient to address the risks posed (41.2%); -- Commercial Forensic Practitioners do not have a formalised investigation process at their disposal (35.3%); -- Commercial Forensic Practitioners are not aware of a formalised investigation process being utilised in industry that could be used (23.5%); and -- The implementation of a formalised investigation process proved too difficult (23.5%). * The most important reasons for implementing a formalised investigation process included reputational risks and quality control of investigative work. It was notable that the study revealed that the industry does not require practitioners to follow any procedures. * It is noteworthy that practitioners did not regard monitoring and management review of compliance with the provisions of their formalised investigation process as an important requirement. The study revealed that the majority of Commercial Forensic Practitioners would measure compliance as an occasional requirement (33.3%); only 23.3% placed compliance as an agenda item for each monthly management meeting and 16.7% as a quarterly agenda item. * The majority (56.3%) of practitioners recognised that integration of a formalised process with the budgeting process could enhance productivity and financial benefits. * The majority of respondents (88.1%) were of the view that there was an improvement in financial performance and/or productivity after the implementation of the formalised investigation process. * 62% of respondents were of the view that there was a significant improvement in financial performance and productivity since the implementation of the formalised investigation process. This finding is significant, as it proves that a formalised process for Commercial Forensic Practitioners in South Africa can have a positive effect on a practise‟s financial performance. The suggested sub-processes, as described, are accepted by the respondents, namely: * Client acceptance, service considerations, risk management procedures, independence and engagement agreements; * Planning and strategic objectives of an engagement, including documented investigative plan incorporating the relevant disciplines (accounting, law, IT, investigative and risk management skills); * Gathering information and evidence, documenting evidence in an evidence file or system and safeguarding evidence as important; * Interviewing, using best practice interviewing skills, by planning the interview to achieve strategic objectives, recording the interview and using technology; * Analysis and verification of evidence; * Quality management, with all reported findings included in referenced working papers supported by documented physical evidence; and * Reporting on findings in a detailed forensic report, clearly and concisely reflecting on the sequence of events, supported by financial information and documents, in a format that could be used in disciplinary enquiries and/or proceedings in civil and criminal courts. These findings fulfil the objective of the study, which was to establish an integrated generic investigation process that could be utilised by Commercial Forensic Practitioners in South Africa and secondly to determine which investigation processes are currently being utilised in South African forensics practices. It was clarified whether the implementation of a formalised process can lead to an improvement in financial performance and what the result of the integration of a formalised process into a practise‟s budgeting process is. It was established that there is indeed a relationship between the integration of the formalised process into the budgeting process and the improved financial performance of a practise. The findings of this study have significant implications for the management of South African Commercial Forensic Practitioner practices. Based on the study findings, the following general and specific recommendations can be made: * The investigation process for Commercial Forensic Practitioners should be fully integrated with the budgeting process of the practise, as this will ensure improved investigative performance by the business; and * Education and research on the investigation process for Commercial Forensic Practitioners should be conducted by the management of a practice before implementing such a process. / MCom (Forensic Accountancy), North-West University, Potchefstroom Campus, 2015

Fraud, corruption, and related taxation consequences from a financial and a moral perspective were investigated in this study. A literature review of tax ethics, tax morality, tax conduct, tax planning, tax avoidance, tax evasion, tax fraud, white-collar crime, fraud, money laundering, corruption and corporate governance are presented. The research methodology and empirical investigation followed, the research results achieved, and the conclusions and recommendations made, are also presented. The most import conclusions from this study are that economic crime (such as fraud and corruption) has an impact on taxation in South Africa, that economic crime offences ignore any possible taxation consequences and that the type of the economic crime being perpetrated is a function of the opportunities available to a potential offender. The majority of the respondents (both economic crime offenders and role-players in the field of the prevention, detection and prosecution of fraud, corruption and tax related offences) indicated that law enforcement, prosecution and sentencing practices are not adequate in South Africa. However, the majority of both groups of respondents also indicated that current laws and regulations are adequate to address economic crime in South Africa. This could be interpreted as a vote of confidence in current laws and regulations but an indication that it should be applied more effectively in the fight against economic crime. Within the legal framework of the criminal justice system and the various taxation laws and regulations in South Africa, there are always opportunities for people to come into conflict with the law. This study was also undertaken to investigate an economic crime offender’s perceptions of fraud, corruption and tax-related offences. In total 82 economic crime offenders, serving a prison term for their offences, completed a questionnaire and were personally interviewed in a semi-structured interview comprising pre-set questions. The study demonstrated that there is a correlation between an economic crime offender’s level of education and the monetary extent of the perpetrated offence. In perpetrating an economic crime, the offender is only concerned about the immediate financial reward, disregarding any possible consequences such as taxation or prosecution. To prevent fraud, corruption and tax-related offences, the motivation to commit such crimes should be eliminated or reduced. Fraudsters weigh up the individual risks and rewards of their criminal behaviour, and for that reason, their future conduct can be modified with appropriate rehabilitation and anti-economic crime education programs. Consequently, this study has vital implications for reformulating appropriate rehabilitation programmes for economic crime offenders. Economic crime offenders should be subject to an anti-economic crime education program in which the consequences of perpetrating economic crime in general on the economy and tax revenue could be conveyed to such offenders. Rehabilitation programs designed and developed specifically for economic crime offenders should be implemented at correctional institutions. / PhD (Tax), North-West University, Potchefstroom Campus, 2013

The study aims to establish an integrated generic investigation process that could be utilised by Commercial Forensic Practitioners in South Africa. Secondly, it aims to determine which investigation processes are currently being utilised in South African forensics practices. An overview is given of the international utilised processes and a basic framework was developed, presented and tested by means of questionnaires to members of the Institute of Commercial Forensic Practitioners in South Africa. The development of an investigation process for Commercial Forensic Practitioners in South Africa could be utilised by the Institute of Commercial Forensic Practitioners to provide a governance structure for the Institute that would enhance the quality of forensic investigations and contribute to the successful investigation and prosecution of commercial crime in South Africa. To achieve the study objective, an empirical study was conducted among current members of the Institute of Commercial Forensic Practitioners in South Africa through the circulation of questionnaires via their website. These results were interpreted, taking cognisance of international practices identified in the literature review. A formalised investigation process was developed and suggested to the Institute of Commercial Forensic Practitioners. Statisticians were involved during the process of designing the questionnaires, and analysing and interpreting the results. The research dealt with a generic investigation process for Commercial Forensic Practitioners. It also dealt with its implementation and investigative performance in South African practices. In this study, an overview of the investigation process for Commercial Forensic Practitioners in South Africa was discussed. The research also analysed the following: * The time period in which organisations implemented the Commercial Forensic Practitioners Process; * The effect of the Commercial Forensic Practitioners Process on investigative performance; and * The integration of the Commercial Forensic Practitioner's process into the budgeting process. The findings of the study revealed the following: * Each of the phases of the Commercial Forensic Practitioners Process is as important as the others in matters that will be presented before court. * An investigation should only be performed if it can be performed properly and in a manner that provides clarity and value to the engagement and its objectives. For this purpose, a Commercial Forensic Practitioner should only accept an assignment if free of conflicts and any independence issues. It is imperative for Commercial Forensic Practitioners to adequately assess not only their relationship to the client and the particular engagement, but also their relationship to any opposing party. This assessment should be done in the context of all other work of the practice, not only that work that is performed by the particular Commercial Forensic Practitioner and direct colleagues. * The Commercial Forensic Practitioner must design, implement and use a robust client and engagement acceptance process that is documented, standardised and, where relevant, agreed with the client. * The role of a Commercial Forensic Practitioner in an investigation process is, therefore, to gather evidence, interrogate and examine the financial evidence, develop computer applications that help in analysing and presenting the evidence, putting forward all the findings in the form of reports, exhibits and documents, and finally taking part in civil actions or litigation as an expert witness, and testifying to the court and presenting all the evidence obtained through documentation or visual aids. It is therefore of the essence that a Commercial Forensic Practitioner be well versed in financial issues and legal concepts and proceedings. * The study found that the majority of respondents (69.3%) were male, while only 30.7% were female. The majority of Commercial Forensic Practitioners fall within two age categories, namely, 35 to 44 and 45 to 54 years. These age categories fall into the productive stage of a working career in the human life-cycle. It is furthermore inferred that the level of experience is of importance, as the majority of participants were well experienced, mostly with at least ten years‟ experience. * A total of 22.7% of respondents indicated that they do not use a formalised investigation process. The majority of respondents (77.3%) thus make use of a formalised investigation process. * The study found that formalised investigation processes are not implemented for the following reasons: -- Managerial and governance processes within practices were sufficient to address the risks posed (41.2%); -- Commercial Forensic Practitioners do not have a formalised investigation process at their disposal (35.3%); -- Commercial Forensic Practitioners are not aware of a formalised investigation process being utilised in industry that could be used (23.5%); and -- The implementation of a formalised investigation process proved too difficult (23.5%). * The most important reasons for implementing a formalised investigation process included reputational risks and quality control of investigative work. It was notable that the study revealed that the industry does not require practitioners to follow any procedures. * It is noteworthy that practitioners did not regard monitoring and management review of compliance with the provisions of their formalised investigation process as an important requirement. The study revealed that the majority of Commercial Forensic Practitioners would measure compliance as an occasional requirement (33.3%); only 23.3% placed compliance as an agenda item for each monthly management meeting and 16.7% as a quarterly agenda item. * The majority (56.3%) of practitioners recognised that integration of a formalised process with the budgeting process could enhance productivity and financial benefits. * The majority of respondents (88.1%) were of the view that there was an improvement in financial performance and/or productivity after the implementation of the formalised investigation process. * 62% of respondents were of the view that there was a significant improvement in financial performance and productivity since the implementation of the formalised investigation process. This finding is significant, as it proves that a formalised process for Commercial Forensic Practitioners in South Africa can have a positive effect on a practise‟s financial performance. The suggested sub-processes, as described, are accepted by the respondents, namely: * Client acceptance, service considerations, risk management procedures, independence and engagement agreements; * Planning and strategic objectives of an engagement, including documented investigative plan incorporating the relevant disciplines (accounting, law, IT, investigative and risk management skills); * Gathering information and evidence, documenting evidence in an evidence file or system and safeguarding evidence as important; * Interviewing, using best practice interviewing skills, by planning the interview to achieve strategic objectives, recording the interview and using technology; * Analysis and verification of evidence; * Quality management, with all reported findings included in referenced working papers supported by documented physical evidence; and * Reporting on findings in a detailed forensic report, clearly and concisely reflecting on the sequence of events, supported by financial information and documents, in a format that could be used in disciplinary enquiries and/or proceedings in civil and criminal courts. These findings fulfil the objective of the study, which was to establish an integrated generic investigation process that could be utilised by Commercial Forensic Practitioners in South Africa and secondly to determine which investigation processes are currently being utilised in South African forensics practices. It was clarified whether the implementation of a formalised process can lead to an improvement in financial performance and what the result of the integration of a formalised process into a practise‟s budgeting process is. It was established that there is indeed a relationship between the integration of the formalised process into the budgeting process and the improved financial performance of a practise. The findings of this study have significant implications for the management of South African Commercial Forensic Practitioner practices. Based on the study findings, the following general and specific recommendations can be made: * The investigation process for Commercial Forensic Practitioners should be fully integrated with the budgeting process of the practise, as this will ensure improved investigative performance by the business; and * Education and research on the investigation process for Commercial Forensic Practitioners should be conducted by the management of a practice before implementing such a process. / MCom (Forensic Accountancy), North-West University, Potchefstroom Campus, 2015

Fraud, corruption, and related taxation consequences from a financial and a moral perspective were investigated in this study. A literature review of tax ethics, tax morality, tax conduct, tax planning, tax avoidance, tax evasion, tax fraud, white-collar crime, fraud, money laundering, corruption and corporate governance are presented. The research methodology and empirical investigation followed, the research results achieved, and the conclusions and recommendations made, are also presented. The most import conclusions from this study are that economic crime (such as fraud and corruption) has an impact on taxation in South Africa, that economic crime offences ignore any possible taxation consequences and that the type of the economic crime being perpetrated is a function of the opportunities available to a potential offender. The majority of the respondents (both economic crime offenders and role-players in the field of the prevention, detection and prosecution of fraud, corruption and tax related offences) indicated that law enforcement, prosecution and sentencing practices are not adequate in South Africa. However, the majority of both groups of respondents also indicated that current laws and regulations are adequate to address economic crime in South Africa. This could be interpreted as a vote of confidence in current laws and regulations but an indication that it should be applied more effectively in the fight against economic crime. Within the legal framework of the criminal justice system and the various taxation laws and regulations in South Africa, there are always opportunities for people to come into conflict with the law. This study was also undertaken to investigate an economic crime offender’s perceptions of fraud, corruption and tax-related offences. In total 82 economic crime offenders, serving a prison term for their offences, completed a questionnaire and were personally interviewed in a semi-structured interview comprising pre-set questions. The study demonstrated that there is a correlation between an economic crime offender’s level of education and the monetary extent of the perpetrated offence. In perpetrating an economic crime, the offender is only concerned about the immediate financial reward, disregarding any possible consequences such as taxation or prosecution. To prevent fraud, corruption and tax-related offences, the motivation to commit such crimes should be eliminated or reduced. Fraudsters weigh up the individual risks and rewards of their criminal behaviour, and for that reason, their future conduct can be modified with appropriate rehabilitation and anti-economic crime education programs. Consequently, this study has vital implications for reformulating appropriate rehabilitation programmes for economic crime offenders. Economic crime offenders should be subject to an anti-economic crime education program in which the consequences of perpetrating economic crime in general on the economy and tax revenue could be conveyed to such offenders. Rehabilitation programs designed and developed specifically for economic crime offenders should be implemented at correctional institutions. / PhD (Tax), North-West University, Potchefstroom Campus, 2013

The occurence of procurement fraud requires from the management of the enterprise, the risk manager of the enterprise as well as the internal auditor to effectively address procurement fraud risks within the enterprise risk management concept. The purpose of the study is to set a procurement fraud risk management process in place which will serve as a comprehensive framework for the enterprise risk manager as well as the internal auditor to limit the enterprise's exposure to procurement fraud risks as far as possible. The study firstly focus on the analysis of the steps within the procurement process which is the starting point for the identification of the fraud risks. Secondly the enterprise risk management model is applied in the format of a procurement risk matrix within the procurement function. The study is an indication that procurement fraud cannot be completely prevented but that the appearance thereof can be limited by means of the extensive procurement fraud risk management model. Recommendations for future studies include the application of the enterprise risk management model in other functional areas within the enterprise. / Die voorkoms van aankoopbedrog vereis van die onderneming se bestuur, ondernemingsrisikobestuurder en interne ouditeur om aankoopbedrogrisiko's effektief binne die konteks van die ondernemingsrisikobestuurskonsep aan te spreek. Die doel van die studie is om `n aankoopbedrogrisikobestuursproses daar te stel wat as `n omvattende raamwerk vir die ondernemingsrisikobestuurder en interne ouditeur kan dien om die onderneming se blootstelling aan aankoopbedrogrisiko's so ver as moontlik te beperk. Die studie fokus eerstens op die ontleding van die stappe in die aankoopproses wat as vertrekpunt vir die identifisering van bedrogrisiko's dien. Tweedens word die ondernemingsrisikobestuursmodel in die vorm van `n aankoopbedrogrisikomatriks in die aankoopfunksie toegepas. Die studie dui daarop dat alhoewel aankoopbedrog nie volkome verhoed kan word nie, die voorkoms daarvan wel beperk kan word deur die toepassing van `n omvattende aankoopbedrogrisikobestuursmodel. Aanbevelings vir verdere studies sluit die toepassing van die ondernemingsrisikobestuursmodel op ander funksionele terreine van die onderneming in. / Auditing / M. Com. (Auditing)

The concept of sustainability has become imperative for any organisation in order to survive and prosper in the long term. As such, the management of fraud risk has become an important component for organisations in order to achieve this objective. The purpose of this study was to explore the management of fraud risk within the South African private hospital sector. The study endeavoured to ascertain how private hospitals in South Africa manage fraud risk. In this regard, problem areas in the management of fraud risk were identified, and recommendations are provided in order to improve the management of fraud risk in the South African private hospital sector. Primary data was collected by means of survey research, which involved management staff at head office level and at hospital level, as these two groups were identified to have the required expertise and experience with regard to risk management procedures and practices within South African private hospitals. The findings suggested that South African private hospitals could improve their current risk management practices, in particular with regard to fraud risk. By implementing the recommendations provided by the study, private hospitals will be able to manage fraud risk more effectively. These recommendations will not only be beneficial to private hospitals, but will also have a positive effect on numerous external stakeholders, because the effective management of fraud risk could lead to considerable cost savings. The public hospital sector of South Africa would equally find the research findings and recommendations of value because it could also be applied to their fraud risk management practices. / Business Management / MCOM (Business Management)

Thesis (MSc)--University of Stellenbosch, 2005. / ENGLISH ABSTRACT: Cellular network operators globally loose between 3% and 5% of their annual revenue to telecommunications fraud. Hence it is of great importance that fraud management systems are implemented to detect, alarm, and shut down fraud within minutes, minimising revenue loss. Modern proprietary fraud management systems employ (i) classification methods, most often artificial neural networks learning from classified call data records to classify new call data records as fraudulent or legitimate, (ii) statistical methods building subscriber behaviour profiles based on the subscriber’s usage in the cellular network and detecting sudden changes in behaviour, and (iii) rules and threshold values defined by fraud analysts, utilising their knowledge of valid fraud cases and the false alarm rate as guidance. The purpose of this thesis is to establish a context for and evaluate the performance of well-known data mining techniques that may be incorporated in the fraud detection process. Firstly, a theoretical background of various well-known data mining techniques is provided and a number of seminal articles on fraud detection, which influenced this thesis, are summarised. The cellular telecommunications industry is introduced, including a brief discussion of the types of fraud experienced by South African cellular network operators. Secondly, the data collection process and the characteristics of the collected data are discussed. Different data mining techniques are applied to the collected data, demonstrating how user behaviour profiles may be built and how fraud may be predicted. An appraisal of the performances and appropriateness of the different data mining techniques is given in the context of the fraud detection process. Finally, an indication of further work is provided in the conclusion to this thesis, in the form of a number of recommendations for possible adaptations of the fraud detection methods, and improvements thereof. A combination of data mining techniques that may be used to build a comprehensive fraud detection model is also suggested. / AFRIKAANSE OPSOMMING: Sellulêre netwerk operateurs verloor wêreldwyd tussen 3% en 5% van hul jaarlikse inkomste as gevolg van telekommunikasie bedrog. Dit is dus van die uiterse belang dat bedrog bestuurstelsels geïmplimenteer word om bedrog op te spoor, alarms te genereer, en bedrog binne minute te staak om verlies aan inkomste tot ’n minimum te beperk. Moderne gepatenteerde bedrog bestuurstelsels maak gebruik van (i) klassifikasie metodes, mees dikwels kunsmatige neurale netwerke wat leer vanaf geklassifiseerde oproep rekords en gebruik word om nuwe oproep rekords as bedrog-draend of nie bedrog-draend te klassifiseer, (ii) statistiese metodes wat gedragsprofiele van ’n intekenaar bou, gebaseer op die intekenaar se gedrag in die sellulêre netwerk, en skielike verandering in gedrag opspoor, en (iii) reëls en drempelwaardes wat deur bedrog analiste daar gestel word, deur gebruik te maak van hulle ondervinding met geldige gevalle van bedrog en die koers waarteen vals alarms gegenereer word. Die doel van hierdie tesis is om ’n konteks te bepaal vir en die werksverrigting te evalueer van bekende data ontginningstegnieke wat in bedrog opsporingstelsels gebruik kan word. Eerstens word ’n teoretiese agtergrond vir ’n aantal bekende data ontginningstegnieke voorsien en ’n aantal gedagteryke artikels wat oor bedrog opsporing handel en wat hierdie tesis beïnvloed het, opgesom. Die sellulêre telekommunikasie industrie word bekend gestel, insluitend ’n kort bespreking oor die tipes bedrog wat deur Suid-Afrikaanse sellulˆere telekommunikasie netwerk operateurs ondervind word. Tweedens word die data versamelingsproses en die eienskappe van die versamelde data bespreek. Verskillende data ontginningstegnieke word vervolgens toegepas op die versamelde data om te demonstreer hoe gedragsprofiele van gebruikers gebou kan word en hoe bedrog voorspel kan word. Die werksverrigting en gepastheid van die verskillende data ontginningstegnieke word bespreek in die konteks van die bedrog opsporingsproses. Laastens word ’n aanduiding van verdere werk in die gevolgtrekking tot hierdie tesis verskaf, en wel in die vorm van ’n aantal aanbevelings oor moontlike aanpassings en verbeterings van die bedrog opsporingsmetodes wat beskou en toegepas is. ’n Omvattende bedrog opsporingsmodel wat gebruik maak van ’n kombinasie van data ontginningstegnieke word ook voorgestel.

自發展塑膠貨幣以來，信用卡的詐欺、盜刷，向來是造成發卡銀行重大損失的風險之一，不僅是當前社會的地下經濟犯罪問題，同時在全球化的過程中，盜刷集團也逐漸發展出跨國分工的犯罪模式，各國發卡銀行在防制信用卡詐欺的策略上，不得不隨之求新求變，以因應盜刷集團詭譎多變的犯罪手法。 在管理詐騙生命週期理論中，偵測是其中極為重要的環節。本篇研究，即是針對如何提升發卡銀行的信用卡詐欺交易偵測效率進行相關研究，藉由相關文獻探討及實務經驗，以歷史資料分析方式，找出影響信用卡詐欺交易偵測效率之因素，來檢視詐欺風險管控措施的成效，同時提供建議，希望找出信用卡詐欺風險偵測之最佳化模式，俾以提升發卡銀行信用卡詐欺交易偵測效率。 本篇研究結果，首先證實在符合筆者所提出的效益/成本的模式下，發送交易警示簡訊，有助於偽卡偵測效率的提升。再者，偵測人員的資歷越深，其偵測效率越高。最後，銀行詐欺交易資訊的交流越密集，越有助於「側錄盜刷」類的詐欺交易偵測效率。 本研究目的除了提出建議以協助銀行減少損失外，盼能藉以喚起社會各界對信用卡詐欺問題之重視，期能遏止當前社會，乃至於國際間信用卡詐欺問題。 / The fraud of credit card usage has caused significant losses in worldwide issuing banks. The fraud syndicates have developed cross-boarder fraudulent activities along with global patners, which not only impacts worldwide economy, but also challenges the strategies initiated by all issuers. Due to the sophistication of the credit card process, experienced people and informative message are required elements to optimize the fraud detection process. The study attempts to analyze those major factors effecting credit card fraud detection process by adapting empirical analysis method on two real cases. Major findings are: 1) under a careful cost and benefit calculation, the more the SMS message sending, the higher the fraud detection rate, 2) the more the experience of detectors, the more effective the performance of the detection, and 3) the more the information shared across issuing banks, the higher the detection rate achieved for fraud skimming. In addition to the optimization of current fraud detection operation, the study is planned to draw public's attention on the serious credit card fraud issue. It is hoped that the attack level of credit card fraud could be mitigated effectively by taking recommendations made by this study.

This diploma thesis focuses on value added tax which is an important part of the tax systems of many countries around the world. In the countries of European Union is this tax compulsory. The main target of this work is to describe the origin of value added tax, the principle of its functioning and its legislation not only in the Czech Republic but also in the European Union. Furthermore, this thesis focuses on the harmonization of value added tax in the European Union, its development and differences in the use of value added tax between the Member States. Finally, this work deals with tax fraud, which threaten the value added tax in particular so-called Carousel Fraud. It describes the factors that enable the creation of tax fraud and tries to answer the question whether the reverse charge mechanism could eliminate the tax fraud. It also makes efforts to find appropriate solutions to the problem of tax fraud.

This dissertation titled Value added tax evasion through chain and carousel frauds and their reflection in judicial decisions pursues a very actual topic. The main part of this dissertation depictss the tax evasions, primarily a description and explanation of structures of carousel and chain groups, which are participating in the tax evasions in the sphere of the value added tax most frequently. This dissertation submits also some schemes serving for better understanding operating and organization of these bussiness structures, which are taking part in these illegal activities. The next chapter focuses on the judicial decisions, mainly those of the Supreme Administrative Court of the Czech Republic and the Court of Justice of the European Union. The role of a judicial authority is inalienable in this sphere, because it helps to form a legislation, and a mandatory interpretation of an unclear or ambiguous terms, which are very often is very importanr too. Mainly, the work of the Court of Justice of the European Union is a key for the interpretation of terms of the EU law. Regarding national differences it is necessary to unify the interpretation of the EU law so much, that the functioning of the inner market of the European Union will not be endangered. In the last chapter the dissertation...