This study evaluated the efficacy of Dynamic Written Corrective Feedback (DWCF) on advanced students' writing accuracy of Spanish. This method focuses on manageable, meaningful, timely and constant feedback. Previously, DWCF was studied in the context of English as a second language. The current study investigated the efficacy of DWCF in the context of students who were enrolled in an advanced Spanish grammar class at the university level. A comparative study was conducted measuring students' writing accuracy who received the DWCF against students' writing accuracy who did not receive this feedback methodology. Results showed that there was not a significant difference in writing accuracy between these two groups of students. However, both groups improved their writing accuracy over time. This study also provided a list of the most frequent writing errors made by 28 students in an advanced Spanish class. The results show that the most frequent linguistic errors for learners of Spanish are accent marks, prepositions, gender and number, punctuation, and word choice.