MD5 Hash Mismatch Error: Miva Merchant

Over the last decade our Miva clients have complained that their customers got this message when they tried to place an order in their store:

Error: “Unable to authorize payment: MD5 Hash mismatch. Please contact the store administrator if you continue to experience this problem.”

Urgency Level: HIGH

Cause: if a store owner changes their MD5 Hash Code in their admin area, and forgets to change it in their Miva store, this causes a mis-match. We have also been told that the way that the payment gateway module in Miva doesn’t always talk to consistanty, which can also cause this issue.

Fix: this one is easy. Merely take out the code from the backend of Miva, and the problem will stop.

MD5 Hash Code Error Miva


Holly Nelson

Holly Nelson, CEO of 2C Development Group brings more than 20 years of success in internet marketing to every project. Her ability to identify production, communication, customer service and logistical pain points and to solve them through increased efficiencies in website design/development, online catalog management sales solutions, online content development and marketing brings consistent, clearly demonstrable ROI to clients. Follow on Twitter and Google+

Leave a Comment