I am writing a php billing system. It's almost done, however, I do have a problem with automatic account creation. PayPal has this thing called IPN (INstant payment notification). PayPal gives you this sample script to put on your server that it posts to everytime someone pays. It validates it and everthing. But, how do I get some order form variables into that script so it could create the account?! Cookies won't do it because the user doesnt access the script. I was thinking about having a temporary row with the stuff in it. But how would the script know which row to take out? Please help me here 🙂