Under what circumstances would it be appropriate to raise a debit note against the supplier payment?

A debit note is appropriate when a buyer needs to formally request a reduction in the amount owed to a supplier due to reasons such as receiving damaged goods, discrepancies in the invoiced quantities, or overcharging. It serves as a record of the buyer's claim for adjustment against the original invoice. Additionally, it is suitable when there are agreed-upon returns or allowances that affect the total payable amount. Raising a debit note helps maintain clear communication and documentation between the buyer and supplier regarding financial adjustments.