| # Procedure: Commodity Trading — Variant 29 | |
| (Variant for commodity_trading domain) | |
| ## Legal Entity Identifier (LEI) | |
| The LEI is a 20-character alphanumeric code that uniquely identifies | |
| legal entities participating in financial transactions. | |
| ## Cross-System Matching Rules | |
| - LEI is the gold standard for counterparty matching | |
| - When LEI is unavailable, use: Tax ID > SWIFT BIC > Name + Jurisdiction | |
| - Name-only matching has high false positive rate (30%+) | |
| ## Common Issues | |
| - Same counterparty with different LEI branches | |
| - Subsidiary vs parent entity confusion | |
| - Post-merger LEI transitions (old LEI remains in legacy systems) | |
| - Sanctioned entities with name variations | |