Legal Entity Identifier Knowledge Base
Plain-language guides to the LEI system, registration, renewals, and the regulations that use the LEI.
Try: "MiFID II", "ISO 17442", "How to renew", "What is LOU"
Featured Guides
What is an LEI?
Learn what an LEI is, why it exists, and how the 20-character code is structured.
How to Get an LEI
See how registration works, what gets validated, and how to compare providers.
Legal Requirements
Which MiFIR, EMIR and Dodd-Frank rules use the LEI, and where each one stops applying.
Glossary
Look up the financial and regulatory terms that appear across the LEI system.
Why the LEI exists
The Global LEI System was created after the 2008 financial crisis so firms and regulators could identify legal entities more reliably. A shared identifier makes cross-border reporting, counterparty checks, and reference-data matching easier.