Hi guys I am now current trying to implement Paypal sandbox in my website for testing. I used the form generated by Paypal and it worked. However, I wish to make it more secure by verifying the POST details against my database first before posting to Paypal. I have read on the internet for a few days and download a few sample codes to try out, however I still dun understand how it works. The thing I read on is IPN (Instant Payment Notification) for Paypal. Am I reading the right thing? If I am can anyone help me out cause I do not really understand part of it.