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e2f1b37 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | # Concept: Commodity Trading — Variant 47
(Variant for commodity_trading domain)
## Background
When acquiring a company, vendor records must be consolidated across
the procurement and AP systems of both organizations.
## Consolidation Rules
1. Match vendors by Tax ID / VAT number first (most reliable)
2. If Tax ID matches: merge records, keep acquirer's vendor ID
3. If Tax ID not available: match by name + address + bank details
4. Never merge vendors with different Tax IDs, even if same name
5. Create alias records for old vendor IDs (preserve audit trail)
## Post-Merger Checklist
- [ ] Export all vendor records from both systems
- [ ] Run automated matching on Tax ID
- [ ] Manual review of name-only matches
- [ ] Create mapping table (old ID → new ID)
- [ ] Update all open POs and contracts
- [ ] Notify AP team of merged vendors
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