Rule · MAJOR

COMMON.LEI_CHECK_DIGITS

Legal Entity Identifier format and check digits (ISO 17442, ISO/IEC 7064 MOD 97-10)

Citation: Annex I, Part A, Annex II, Part A, Annex III, Part A MiCAR
Canonical form: Anhang I Teil A, Anhang II Teil A, Anhang III Teil A MiCAR
Runs for: Annex I · other crypto-assets; Annex II · asset-referenced tokens; Annex III · e-money tokens
Severity if open: MAJOR
Section key: all sections; anchored to issuer
Minimum words: 0
Listed terms (English): none
Listed terms (German): none
Package version: 1.2.1, built from source that may include unreleased changes
Source: rules/common.py

How the status is set

Missing: no LEI-shaped code (18 letters or digits and two check digits) appears in any section. A 20-digit number counts only next to an LEI label.
Review: an LEI-shaped code fails the ISO/IEC 7064 MOD 97-10 check digits.
Pass: every LEI-shaped code has valid check digits. No registry is asked.

Legal basis

Annex I, Part A, Annex II, Part A, Annex III, Part A MiCAR

https://eur-lex.europa.eu/eli/reg/2023/1114/oj/eng

Not re-verified since these pages were introduced (2026-10-20): EUR-Lex was unreachable from the build environment. The citation is the rule's own, unchanged. The citation is the Part of each Annex that the party rules already cite. The point that names the LEI has not been verified against the Official Journal; treat the legal basis as pending owner review.

Synthetic examples

Each example is linted when this page is generated. The build fails if a result differs.

MissingNo LEI in the draft

Without an LEI there are no check digits to verify, so the rule fails closed.

{
  "title": "Synthetic rule example",
  "type": "other",
  "sections": {
    "issuer": "Synthetic Issuer AG."
  }
}

ReviewCheck digits do not match

The last two digits do not satisfy ISO/IEC 7064 MOD 97-10, which usually means a typo.

{
  "title": "Synthetic rule example",
  "type": "other",
  "sections": {
    "issuer": "Synthetic Issuer AG. LEI: 9999SYNTH0000ZZQ0167."
  }
}

PassCheck digits match

The code is well formed. The check does not ask a registry whether the LEI exists or belongs to the named entity.

{
  "title": "Synthetic rule example",
  "type": "other",
  "sections": {
    "issuer": "Synthetic Issuer AG, a fictional company. LEI: 9999SYNTH0000ZZQ0166."
  }
}

Limitations

Reads every section of the draft; findings are anchored to the issuer section.
Works offline on the characters of each code. It does not confirm that an LEI is registered, current or held by the entity the draft names.
Status and severity are fixed by the rule. A draft cannot waive or downgrade them.
The citation is the Part of each Annex that the party rules already cite. The point that names the LEI has not been verified against the Official Journal; treat the legal basis as pending owner review.

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