Say goodbye to the Temporary Importation Permits or Permiso de Importación Temporal de Vehículos that you used to know, now, as of January 1, 2020 the permits are digital and there are no more window stickers, also no originals, just a digital copy for those who request the permits via the internet.
The good news is that if you save the digital copy in your email, there is no risk of losing the permission as used to be the case.
*** People crossing by land are still being given the old style permits.
*** People crossing by land but who get their Temporary Importation Permits or Permiso de Importación Temporal de Vehículos online MUST still stop at the border to register their entry into Mexico, failure to do so will make them have to return to the border to check in and turn in their FMM form.
Police officers will have a cell phone application to be able to scan the new permits and verify them. Hopefully the police and transitos know about the new permits and will not insist on seeing the old ones pegged to the windshield.