Java Backend Technology

Oct 29, 2020 · Operations

How to Prevent Duplicate Payments and Order Expiration in Payment Systems

This article examines common payment system anomalies such as duplicate charges and order expiration, explains how asynchronous and synchronous payment flows contribute to these issues, and provides both pre‑payment and post‑payment strategies—including UI improvements, return URLs, status checks, and automated refunds—to prevent and resolve them.