Many visitors, having already left Mexico, discover that they did not have a stamp on their departure from the state in their passport. Doesn't this mean that their departure was not formalized in the required manner? Will there be any problems the next time you enter Mexico?
Mexico does not put exit stamps on the passports of visitors to their countries. At the country's airports there is no passport and migration control at all, which is common at the airports of many other countries in the world. The functions of migration control are partially performed by the airline. It checks the difference between the travel ban and exceeding the permitted period of stay. If necessary, the airline employee directs the passenger to resolve the issue at the migration service office at the airport, and then the matter is most often limited to paying a fine for overstay.
Once check-in is completed and the airline has issued you a boarding pass, you proceed to the fromflight lounge. Before aviation security, the airport officer will check your boarding pass and compare it with the data in your passport, but this is not immigration or passport control.
After the flight, the airline transfers the passenger’s data to the migration service, this data is entered into the migration database, and the passenger is considered to have left the country.
At the land border with the United States, any control on the part of Mexico is completely absent, and we have no idea how the immigration service will know that a tourist has left the country if he traveled overland to the United States.
If you visited Mexico as a traveler and did not find an exit stamp in your passport — That's how it should be. The absence of a stamp does not mean that you left Mexico without exit registration and does not in any way affect subsequent entries.
And from if you are a resident of Mexico, it is very necessary to have a stamp about leaving Mexico. Not required, but recommended. Especially if you are going to apply for citizenship. Get an exit stamp for your passport — from the responsibility of the resident, not the migration service. Before leaving, by air or by land, you should independently contact the migration service office at the airport or at the border, present your resident card and ask for preparations for departure. A record of your departure as a resident, and not as a guest of the country, will be entered into the migration database; an exit stamp will be placed in your passport. When leaving across the land border, you will also have to issue a paper migration form FMM.
The absence of an exit stamp in a resident’s passport will not have any consequences, except for one, but very significant one. When submitting documents for naturalization, you are not able to confirm the number of days from Mexico for the last 2 years. In the best case, you will be allowed to calculate the period of absence taking into account the last registered departure, but most often you will have to start counting from 2 years before naturalization again. In recent years, the migration service has not accepted retroactive confirmation of departure in the form of boarding passes.
How a resident can arrange exit and entry to Mexico, we described in this publications.