⚠️ Experimental endpoint — not yet a stable contract. This resource ships as experimental / beta. While experimental, its schema and behaviour may change without a version bump — including breaking changes within v1.0 itself. Anyone consuming it does so for evaluation only, or by coordinating adoption with their account manager so changes can be sequenced with them. It graduates to a stable, version-locked contract (where the normal breaking-change rules apply) only when this experimental notice is removed.

Creates and returns a new reimbursement record with negated amounts that reverses the original record. A record that is already reversed, or is itself a reversing record, cannot be reversed again.

This is not an accounting credit note against an invoice — reimbursement records are stateless computed entries, so a credit is the reimbursement-domain analogue of a correcting entry.