ISO 17442-1:2020

Overview

ISO 17442-1:2020 defines the assignment rules for the Legal Entity Identifier (LEI) used in financial services. The standard specifies the minimum elements of an unambiguous global LEI scheme to identify legal entities involved in financial transactions. The LEI is intended for automated processing and straight-through processing (STP) yet is also suitable for other media (e.g., paper). The standard covers eligible entities (corporates, funds, banks, international branches, governmental and supranational bodies, and individuals acting in a business capacity) and explicitly excludes natural persons.

Key topics and technical requirements

• LEI format: a 20-character code - 18 alphanumeric characters followed by a 2-digit check digit pair (format: 18!c2!n).
• Check digit calculation: based on ISO/IEC 7064 (MOD 97-10). Letters are converted to digit pairs (A=10 … Z=35), two zeros appended, divided by 97; remainder subtracted from 98 gives the check digit pair. Valid pairs are in the range 02–98 (00, 01 and 99 are invalid). Correctly formed LEIs will yield a remainder of “1” when processed per the standard.
• LEI data record: mandatory reference attributes to ensure unambiguous identification, including:
  • legal entity name and registry identifier
  • legal form (as per ISO 20275)
  • address of legal formation and jurisdiction (ISO 3166)
  • creation date, first LEI assignment date, last update and effective dates (ISO 8601)
  • headquarters or branch address, international branch linkage
  • direct and ultimate parent identification (or explanation why absent)
  • investment-fund-specific attributes (fund manager, umbrella/master links)
  • status of legal registration and of the LEI data record (validation/publication/updating)
• Design principles: LEI contains no embedded intelligence, is persistent, interoperable, extensible, and free for use and redistribution.

Applications and who uses it

• Regulators and supervisory bodies for transaction and exposure reporting, market oversight and systemic risk analysis.
• Banks, brokers, asset managers, exchanges and custodians for KYC, trade reporting, counterparty identification and STP.
• Investment funds and fund managers to link sub-funds, master-feeder structures and management entities.
• Fintechs, data providers and risk management teams for entity resolution, credit risk, AML/CFT compliance and aggregation of cross-border exposures.
• LEI issuing organizations and data registries that implement assignment, validation and publication workflows.

Related standards

• ISO/IEC 7064 (check character systems - MOD 97-10)
• ISO 3166 (country and subdivision codes)
• ISO 8601 (date/time representation)
• ISO 20275 (entity legal forms - ELF)

ISO 17442-1:2020 is part of the ISO 17442 series and provides the foundational assignment rules and data model necessary for robust, global legal entity identification in financial services.