The purpose of the Strengthening Transaction Oversight and Preventing Payments Fraud Act of 2026, also known as the STOP Payments Fraud Act of 2026, is to enhance the security and oversight of financial transactions by allowing banks to take additional precautions when dealing with potentially fraudulent checks and wire transfers. The goal is to prevent financial fraud and protect consumers and financial institutions from losses associated with fraudulent activities. Key provisions of the Act include several amendments to the Expedited Funds Availability Act.