When a worker is integrated into PEMEX, they are automatically registered in the ASISTE system. However, the employee must go to the Human Resources department to obtain their initial access credentials. For a first-time login, the initial code is usually generated as follows: the last 4 digits of your CURP (Unique Population Registry Code) plus the last 4 digits of the folio number found on the back of your PEMEX credential.

Because this is "exclusive" data, the system will likely prompt you for a second factor. You may receive an SMS with a 6-digit code, or you may need to open the PEMEX Token app on your smartphone. Enter the code within 60 seconds.