What is Partial refund?

Refunding less than the original transaction amount; may be issued multiple times up to the original captured sum.

A partial refund is the return of a portion of the original transaction amount to the cardholder's account, initiated by the merchant after the original payment has been authorised and captured.

This process typically involves the merchant sending a refund request message, often labelled as a "Credit" or "Refund" transaction, to their acquirer, specifying the amount to be returned to the cardholder's issuing bank.

While the specific message fields vary by scheme and acquirer, a partial refund request will always reference the original transaction's unique identifier, such as the Acquirer Reference Number (ARN) or a similar trace ID,

to link it back to the original debit entry and ensure the correct amount is reversed to the correct card.

Operationally, merchants initiate partial refunds through their payment gateway or point of sale (POS) system interface, typically by selecting the original transaction and entering the desired refund amount.

Merchants must ensure the sum of all partial refunds for a single transaction does not exceed the original captured amount, as attempts to refund more will be declined by the acquirer or scheme.

A common mistake is for merchants to attempt a partial refund for an amount greater than the remaining balance available from the original transaction, which often occurs when multiple partial refunds have already been processed against the same original payment.