What is the procedure for disputes regarding GPC transactions?

The correct procedure for handling disputes regarding Governmentwide Commercial Purchase Card (GPC) transactions is to report the issue to the issuing bank immediately. This action is crucial because timely notification of disputes enables the bank to initiate an investigation and take appropriate actions to resolve the issue effectively. Reporting the dispute promptly also helps protect the cardholder's rights and may prevent further unauthorized charges or complications from arising.

While contacting the vendor directly might seem like a reasonable first step, it does not ensure that the cardholder’s financial institution is involved in the resolution process. Similarly, waiting until the end of the month could delay the dispute resolution and potentially exacerbate the issue. Ignoring the problem is not an option as it could lead to further complications and financial loss. Therefore, reporting disputes to the issuing bank immediately is the best approach to ensure the dispute is handled correctly and swiftly.