In the vast majority of the world, there are full border checks, with stamps, on entry as well as Exit. No eyebrows raised about missing Exit stamps at all. Mexico has not been stamping passports for departing passengers since the late 1980's. Safe travels.

As of 2026, the process for exiting Mexico has become largely digital, and physical exit stamps are rarely issued at international airports. Mexico has phased out the paper FMM (Forma Migratoria Múltiple) in favor of a digital system. When you fly out, your "exit" is recorded electronically when the airline swipes your passport at the gate; this data is shared directly with Mexican Immigration (INM). However, if you are exiting via a land border, the situation is different. You may need to stop at an INM office at the border to ensure your entry record is closed out, especially if you were in the country on a long-term visa. If you were a tourist who entered digitally, your departure is usually tracked via your boarding pass. It is vital to ensure you do not "overstay" your allotted days (usually 180), as the electronic system will flag this immediately upon your next attempted entry to Mexico. While you might want the stamp as a souvenir, the digital "handshake" between the airline and the government is now the legal proof of your departure for most air travelers.