LEI Validator

Check a LEI (Legal Entity Identifier) form and its check digit, right in the browser. The legal-entity identifier that increasingly shows up in e-invoices and payment messages.

LEI (Legal Entity Identifier, 20 characters)

Local validation of the ISO 17442 structure and the ISO 7064 MOD 97-10 check digit. Existence in the GLEIF index is not verified.

How it works

The LEI (ISO 17442) is a 20-character code: a 4-character LOU prefix (the registration unit that issued it), 2 reserved positions (00), 12 entity-specific characters, then 2 check digits. The validator:

checks the length (exactly 20) and the alphanumeric format;
recomputes the check digit with ISO 7064 MOD 97-10: the whole string, letters mapped to numbers (A=10…Z=35), must equal 1 modulo 97;
shows the LOU prefix, the entity part and the check digits.

What a LEI is for

The LEI uniquely and globally identifies a legal entity party to a financial transaction. It is required in regulatory reporting (EMIR, MiFID II), appears in ISO 20022 messages and, increasingly, as a buyer or seller identifier in e-invoices. The GLEIF (Global LEI Foundation) index is its free, public registry.

Privacy

Limits

IBAN Validator / BIC Validator — the other payment identifiers.
ISO 20022 — where the LEI identifies parties (Othr/Id with the LEI scheme).