The Population Registry Unique Code (Spanish: Clave Única de Registro de Población) or CURP is a unique identity code for both citizens and residents of Mexico. Each CURP code is a unique, alphanumeric 18-character string intended to prevent duplicate entries.

Typically you get one for the first time when you obtain your FM3. You need it to get your social security card, your driver’s license, getting your FM2 or citizenship (naturalization), for buying a vehicle or home, opening a bank account and for most other legal and tax business in Mexico. (more…)