Hi, I have been working with IPN for a long time now and I decided a couple days ago to add a couple more security features such as checking certain values against my current client database. More or less its a simple if...else... statement. I have had my script working for several months and it was working fine. Now, for some reason, I am having some trouble. No matter if a payment is good(VERIFIED) or not(INVALID), my script does not pick it up. So as a debug edit, I added a final else to output $res which is the result of the ipn. this is what it ouputs "HTTP/1.1 200 OK". Im really lost on whats going on now. If anyone could help, I would very much appreciate it. Im using php and my base code is from www.eliteweaver.co.uk. Thanks again in advance. Nick