Partial Refund

Overview

What it means and why it exists

A partial refund returns only part of a customer's original payment while leaving the rest allocated to the purchase or service. It is common for partial cancellations, adjustments and disputes.

How it works

The merchant computes the approved refund amount under the order's price and fee rules, records its relation to the original payment and checks cumulative prior refunds. It then creates an outbound transaction or internal credit to the validated recipient. The system updates the order and accounting balance without marking the whole order void unless required.

Technical details worth understanding

For crypto, the parties must agree whether a fraction is calculated in original token units or fiat value using a specified rate. Multiple partial refunds need precise decimal arithmetic and an upper bound so cumulative refunds never exceed the authorized obligation. Separate network fees should be accounted for explicitly.

What can go wrong

Mistaking a partial refund for a full one can over-credit the customer and distort inventory and revenue reports. Sending a refund to the original input address is unsafe when an exchange or custodian funded the payment. Repeated API or webhook events must not duplicate the refund.

Practical checks

Calculate cumulative authorized refunds in the smallest applicable units and prevent crossing the original refundable maximum. Preserve the conversion rate or unit policy used for partial returns. Support should be able to reconstruct each refund and its remaining balance, including a failed outgoing transfer that must not count as completed reimbursement.

Related concepts

Crypto Settlement, Crypto Payout, Settlement Reconciliation.

Further reading

Bank for International Settlements — Payment and Market Infrastructures.