Thanks Widesky. That was the same link that I used earlier this afternoon - I already have a CURP. After filling all of the fields, I received the comment: SU TRÁMITE HA FINALIZADO (your process has finished). Right beside it was a number that started with RF and ended with 13 consecutive numbers. I have an uneasy feeling that this number may be something different than a RFC. Maybe I receive it later from SAT or have to go to the SAT office, which I was trying to avoid. Any thoughts?