Mexico document validators: RFC, CURP, CLABE
RFC (Mexican tax ID)
13 characters for individuals (4 letters + YYMMDD date + 3-char homoclave) or 12 for companies (3 letters).
CFDI 4.0 e-invoicing, customer onboarding, payroll, Mexican marketplaces.
CURP (Mexican population ID)
18 characters: 4 name letters, YYMMDD birth date, sex (H/M/X), state (2), 3 inner consonants, a differentiator and a check digit.
Bank onboarding, government services, school and health systems.
CLABE (Mexican interbank account number)
18 digits: bank (3), city/plaza (3), account (11) and control digit (1).
SPEI transfers, payroll disbursement, supplier payouts.