Move money simply wherever you are in the U.S. with the Serve app. Serve is an easy way to pay back a friend or get them to pay you back, split the dinner bill or collect money for a group event. The Serve app gives you instant access to your Serve account. As a Serve account holder you can also purchase online or get a Serve card to use in stores everywhere American Express Cards® are accepted.Because Serve is provided by American Express, your transactions and personal information are secure. We use advanced encryption technology, confidential PINs, and multi-factor authentication to keep you safe.Download the Serve app to: