It is now more than two years since the new Civil Code (OZ), which unified the previous predominantly two-way regulation of the discharge of obligations in one single codex, became effective. As a follow-up to this legally significant event, the focus of my PhD thesis (dissertation) has been on analyzing the resulting changes in comparison with the foregoing legal regulation of the Civil Code and the Commercial Code, including a deliberation on whether such changes have been positive or, alternatively, whether the new regulation can be reproached for certain shortcomings. Although the regulation of OZ which deals with the termination of obligations due to unilateral legal act (such as satisfaction/fulfillment of an obligation (in Czech: "splnění"), deposition in court custody (in Czech: "složení do soudní úschovy"), withdrawal from a contract (in Czech: "odstoupení od smlouvy"), contract cancellation fee (in Czech: "odstupné"), cancellation/termination of a contract by a notice of cancellation/termination (in Czech: "výpověď smlouvy"), and unilateral set-off (in Czech: "jednostranné započtení")) mostly follows up the preceding regulation, it also introduces certain new elements. These new elements evidently intended both to remove certain issues of smaller relevance resulting from the current...