2025-08-01 00:00:00 My SINESAT is the official application of the NATIONAL INTERCOMPANY UNION OF HIGHER EDUCATION SANTO TOMAS My SINESAT corresponds to the official application of the SANTO TOMÁS HIGHER EDUCATION INTERCOMPANY NATIONAL UNION, in which members can access and contemplate a series of functionalities. Among the most important are: 1. Review union dues debt: If you have debts, it is possible to obtain all the details with the date and how to pay.