My 7 day tourist visa

What a pain...

As you prob know that's the "free" stay... where you can enter and leave without paying anything... but maybe you could get the FMM sorted out at the INM office in Mex City (if you're passing by?) for 500. Otherwise, if you're cross at, say La Mesilla, I think it would be easy to just pay for the few days of overstay at the bank... haven't done it in a while and can't say what the fee would be, maybe 500 for the full FMM? Definitely not more I'd guess.

I think it would be in your interest to get it sorted out before your seven-day permission to visit expires.

...as a matter of convenience, but practically speaking, there is close to zero chance of it being a problem and not easily sorted at the border (maybe 1 in 3,500,000,000, better odds if you've got an awful strange look to you).

Yes, there was always that one lady that one year, but it's worth mentioning that saving it till the end doesn't make anyone an illegal or anything, just someone pending an administrative formality.

Go to the nearest / most convenient INM office and seek to work it out. The 7-day permission is unusual and a 'red flag' initiated by the agent after having looked at your record in INM's database. Maybe because most prior trips were of short duration.

LW

The 7-day permission is unusual and a 'red flag' initiated by the agent after having looked at your record in INM's database.

Buzzzzzzzzzzzzzz.

You are incorrect, sir. Thank you for playing Guess About Mexico.

...kidding aside, it is the totally standard "free" visa that they hand out every day to people who are just transiting through the country. Possibly a lack of communication involved, maybe he thought you were holding up 7 fingers.

What on earth would cause an agent to nefariously give someone a week in the country because of some red flag? Think about how little sense that makes. Let sketchy people in, BUT... hit them with extra paperwork.

https://www.tripadvisor.com/ShowTopic-g150800-i164-k8945540-Overstay_Mexico_on_free_7_days_visa-Mexico_City_Central_Mexico_and_Gulf_Coast.html

...just one similar question of course, it doesn't take too much poking around to find out that it's SOP. Unfortunately neither this forum nor the other has ever been a shining beacon of fact when it comes to this subject.

Also: if you don't send an update in 7 days, I'm going looking for you in the detention centers with a printed out picture of your Thorn Tree avatar. Don't worry, I'll get you out. ;)

Correct. A communications mishap. The border agents were speaking to me in relatively fluent English, so I assumed they understood when I said I´d be in the country for a month.

I will be going through Mexico City. Is it possible to find the INM agents at the airport when arriving on a domestic flight? Or do you know the address for an office in the city center?

Actually, #4's post may have some validity (see points 1 & 3):
https://yucalandia.com/2017/09/02/inm-continues-to-increase-enforcement-of-restrictions-on-6-month-tourist-visas/
can't say what the fee would be, maybe 500 for the full FMM? Definitely not more I'd guess
Thank you for playing Guess About Mexico.