If you plan to live, work, or spend serious time in Mexico, one acronym will follow you everywhere: CURP. Short for Clave Única de Registro de Población, it's a unique alphanumeric code that identifies a single individual — and in 2025 it's getting a biometric upgrade that has generated plenty of confusion.
First, the basics. Every Mexican is assigned a CURP at birth, and anyone granted legal residency in Mexico gets one automatically too. It's usually printed on your residency card, though not always, and you can look it up online if you can't find it. Don't confuse it with the RFC, which is Mexico's tax identification number.
What's new is the Biometrical CURP. Lawmakers legislated for a digital version in 2025, designed to eventually replace the current printable code. To get one, people visit special processing centres — local RENAPO and Civil Registry offices — to have their fingerprints, face and irises electronically scanned. The idea is to tie the identification number to actual biometric features, potentially creating a universal ID document for the country.
Is it mandatory? That's where the messaging got messy. Late in 2025, media reports claimed the new law made biometric enrolment compulsory, but President Claudia Sheinbaum pushed back at a press conference, insisting participation is optional and that nobody is being forced to hand over biometric data. She predicted most people would opt in once the benefits were explained. In practice, though, the situation is murkier: healthcare, government programmes, school enrolment and banking may all become difficult — or impossible — to access without the biometric version. For now, the regular CURP is still universally accepted.
And the CURP itself matters a lot. You'll be asked for it when applying for a passport or voting card (if you're Mexican), enrolling in the IMSS national healthcare service, registering an RFC at the tax office, getting a driving licence or vehicle plates, opening a bank account or applying for a mortgage, signing up for school or university, joining social programmes, and even buying imported goods online — retailers like Amazon must collect it to process imports. Employers need it for payroll too.
For foreign residents specifically: your CURP comes automatically with your Temporary or Permanent residency card. The RENAPO website currently directs foreigners to their local immigration office for CURP-related matters. What remains unclear is whether immigration offices will start collecting the extra biometric data (beyond what they already gather when issuing residency cards) and issue Biometric CURPs automatically, or whether existing residents will face a separate application process. If you're settled in Mexico or planning a move, keep an eye on this — it affects how smoothly you can access healthcare, banking and schooling.
To apply, head to RENAPO's site at renapo.gob.mx to find your nearest office and book an appointment. If you're skipping the biometric version for now, be aware you may hit friction with certain services down the line.
Story via Mexperience.
