I am able to verify my endpoint using a php program found here. https://forums.developer.ebay.com/questions/43122/working-code-marketplace-account-deletion-notifica.html However, when I send the test notification I always get this message... "Notification delivery failed with HTTP status code 400 from https://www.mydomain/folder/file.php. Please ensure that the marketplace account deletion notification endpoint is ready to receive notifications." Some people say they got this code to work. Others say they get a 444 error. I've spent days on this and after hours of debugging, it appears that the test notification isn't even reaching my server. Or, if it is, it's not transmitting any data there. If ebay can't get the test message to my verified endpoint how can I be expected to complete this. PLEASE HELP !