
LEI vs ISIN vs DUNS vs EIN vs VAT Number
The quick answer on which identifier you need If your company operates internationally, applies for credit, files taxes, or trades financial instruments, you’ve probably run into an alphabet soup of identifiers: LEI, ISIN, DUNS, EIN, UEI, GIIN, VAT number, company registration number. They show up on the same forms. They sound alike. More than one accountant has mistakenly sent a bank a DUNS number instead of an LEI code. In reality these are eight completely different systems that happen to all be numbers or alphanumeric codes next to your company’s name. Most businesses don’t pick one identifier over another. They accumulate several over time, because each one unlocks a different system: Identifier Issued by Format Main purpose Who typically needs it Company registration number National business registry Varies by country Proves legal existence and incorporation Every registered company VAT number







