Matching of credit notes governs reconciliation of supplier output tax reductions and reclaim when recipients amend returns. Matching requires suppliers' reductions in output tax liability to be reconciled with recipients' input tax credit reductions and checked for duplication. Accepted matches are communicated to suppliers. Discrepancies or undeclared credit notes are notified to both parties and unrectified amounts are added back to the supplier's output tax liability in the following return; duplicated reductions are similarly added back when communicated. Suppliers may reclaim added amounts if recipients subsequently declare the credit note within the prescribed period, and refunded interest is limited to the interest paid by the recipient.