Hi, we have found and resolved the issue. The problem was that we used only the leaf certificate to initialize the ssl comunication with applepay, and that caused the error in the majority of the transactions on our production environment. Note that this configuration was working until June 26th 2025, we don't know what happened/changed after that date. The solution was to configure and use the other 2 ssl certifcates (root and intermediate) into our .pem file. Claudiu.