Posts about Fintech

September 24, 2026

11 min read

RFC, CURP, CLABE and NSS: the Mexican ID Validation Algorithms, Explained with Worked Examples

Mexico Validation TypeScript Algorithms Fintech

Typographic cover: the word RFC above a diff, GODE561231GR with a missing check digit in red and GODE561231GR8 in green, and the sum 1026 mod 11 = 3, 11 − 3 = 8

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