Report Naturalization process reopens in Customs and Immigration Posted December 22, 2021 According to the D.O.F. this tramite is once again available. I see a few changes. The new process requires three appointments: Primera cita to deliver copies of your passport and INM card, and other documents. This allows them to check if you meet basic requirements. Segunda cita to give your biometric data (probably fingerprints) and show the originals. Tercera cita to attempt the exams on Mexican history and the Spanish language. Only two attempts are allowed for the exams. After that, your naturalization application is cancelled and you have to wait 3 months to start over. Unless I've misinterpreted this, it looks really sub-optimal assuming the history/culture exam is difficult. Everyone's time is wasted if the applicant makes it to the exams and then cannot pass. Edited to add that is for naturalization by residency.