How is a refund on a split (multi-vendor) order allocated and settled?

A refund on a split order is allocated to the correct vendor's portion, and the settlement is adjusted accordingly. Because each vendor fulfilled its own part, a refund for an item belonging to Vendor A affects Vendor A's settlement, not Vendor B's. So the money flows back from the right place, and the month-end settlement reflects the refund against the appropriate vendor's…

A refund on a split order is allocated to the correct vendor's portion, and the settlement is adjusted accordingly. Because each vendor fulfilled its own part, a refund for an item belonging to Vendor A affects Vendor A's settlement, not Vendor B's. So the money flows back from the right place, and the month-end settlement reflects the refund against the appropriate vendor's ledger. This keeps multi-vendor accounting honest when returns happen.