CFE's newest gimmick that some are calling a scam. Lots of news articles about technical difficulties with incorrect meter readings, over charging and the difficulty of dealing with the new system and CFE in general.
Once you get on this program you become responsible for reading your meter with the card, taking the card to CFE and putting it in their machine for a printed bill .... and then paying it "once a month". You are assigned a day of the month to read your meter and then probably have a few days to pay it. A whole new payment program. Problem with this is if you don't do it correctly and on time your electricity will be shut off. What if you go on vacation, what if you only live in Mexico part of the year, what if you have rentals, what if you are not able to visit the nearest CFE office or it is very difficult to do so. Supposedly prepayments won't be allowed so paying ahead for time you are gone may not be possible.
Really ridiculous for CFE to think they can replace human meter readers with the public and a magic card. Just remember this program is voluntary and you can decline even if they give the impression it's required. And if you got into this program without understanding it .... go to CFE and cancel now !!