📰 Dev.to · Leszek Czajka
Articles from Dev.to · Leszek Czajka · 2 articles · Updated every 3 hours · View all reads
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Dev.to · Leszek Czajka
3w ago
KYC Onboarding Validation Checklist — IBAN, LEI & VAT in One Flow (Python)
Build a complete KYC validation flow in Python. Validate IBAN (mod-97 + bank lookup), LEI (MOD-97 + GLEIF entity check), and VAT (checksum + VIES confirmation)
Dev.to · Leszek Czajka
1mo ago
LEI Validation in JavaScript — GLEIF Lookup Without Rate Limits
How to validate Legal Entity Identifiers, why mod-97 alone isn't enough, and how to enrich LEIs with entity data from a 2.3M record GLEIF database.
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