Between two possible practices when supervising a remote synchronous evaluation, during the COVID-19 pandemic, the majority of Spanish universities opted for the use of videoconferences with audio and active video, instead of implementing e-proctoring. Thus, in order to analyze the reasons for this non-implementation and take measures so that its use can be extended in the Spanish university system, this study focused on identifying the critical factors in the decision of Spanish universities to accept and implement e-proctoring as a method of remote supervision. For this, a causal study was carried out using the methodology of fuzzy cognitive maps, and the data obtained were processed through the FCMappers tool. This allowed a glimpse of the key role played by students in this non-implementation (who alleged the non-possibility of having the resources necessary for the use of e-proctoring and the violation of privacy that the use of this tool entailed) and highlighted the role of the “pressure or incentives from government” factor if these allegations are to be eliminated and if e-proctoring is to be implemented in Spanish universities.