Invalid remote certificate while accessing PayPal Sandbox transaction service

0
votes

I am testing my application with PayPal sandbox.

The URI I use for the transaction is https://sandbox.paypal.com/cgi-bin/webscr?cmd=_xclick.

In my return page I read the data from PayPal then I form a new string to send back with cmd = _notify-validate. When I make a call to https://sandbox.paypal.com/cgi-bin/webscr I am getting error saying "The remote certificate is invalid according to the validation procedure."

I tried making a call to https://www.paypal.com/cgi-bin/webscr instead and it always return t "INVALID".

1
asp.netpaypalpaypal-ipn

1 Answers

0
votes

This appears to be an SSL issue: This error message is caused because the process is not being able to validate the Server Certificate supplied by the Server during an HTTPS (SSL) request. The very first troubleshooting step should be to see if the server supplied certificate and every certificate in the chain is trouble free.