I am receiving the error message “Security check failed, payload is not processed.” when processing an EDI document from a new Trading partner I configured using TN. I set up the same partner in test with no problems. The service I am using is the same as test. The only difference is the certificates, url, and DUNS number. EDI documents are being received by the vendor without any problem. I think I have narrowed the problem down to the wm.tn.doc:recognize service causing the problem. Seems the message is a result of the MDN being sent. The service I am using is basically a clone of the processMsg service with a ftp added. I have been stuck on this for a week and have not received any meaningful help from WM support.