Overpayment Policy

Overview

How it works

Within Overpayment Policy, and especially at the boundary with Overpayment Handling, reporting should distinguish the number and value of exceptions, their root causes, recovery methods, customer impact, and any loss absorbed by the merchant. For Overpayment Policy, the organization should also preserve the rule version and responsible owner used to resolve the final outcome.

What matters in practice

An overpayment policy defines what happens when accepted funds exceed an invoice's payable amount. The business should document tolerances, crediting behavior, refunds, exchange-rate handling, fee responsibility and customer verification. Overpayment in token units may differ from overpayment in fiat value when a quote expires or a price moves. Automatically returning funds to the on-chain 'from' address is risky because that address might belong to an exchange, relayer or contract. A controlled refund workflow should verify the beneficiary and supported destination first.

The policy should cover refunds of excess that are too small to return economically. For instance, refund network fees can exceed a tiny overpayment; the merchant may offer account credit if terms permit. Multiple small deposits that cross the requested amount create a different reconciliation pattern from one obviously oversized transfer. Any return must be traceable to the original payment and validated destination.

Related glossary concepts

Overpayment Tolerance; Overpayment Handling