Credit Memo

A credit memo (credit memorandum, credit note) is the seller's formal instrument for reducing a customer's balance: it reverses all or part of a previously issued invoice to account for returned goods, pricing corrections, shipment shortages, damaged product, or negotiated allowances. It is the mirror image of an invoice and posts to AR as a negative amount, either applied against the specific invoice it corrects or left on account for the customer to use.

Discipline around credit memos matters for both control and clarity. Every memo should reference the original invoice and carry a reason code, because untraceable credits make account reconciliation miserable and reason-code data is the raw material for root-cause analysis of billing quality. Approval limits matter too: a credit memo is economically identical to a cash payment out the door, and a lax memo process is a classic channel for both sloppy revenue leakage and deliberate fraud. Auditors look at credit memo volume, authorization, and timing (memos clustered after period end can indicate earnings management).

Operationally, slow credit memo issuance is a hidden driver of aged AR and customer friction. When a customer short-pays for a legitimate shortage and the memo takes six weeks to issue, the residual balance sits in aging, collectors chase it, and the customer's AP team learns to distrust the seller's invoices. Cycle time from dispute validation to memo issuance is worth measuring alongside dispute resolution time itself.