asp.net - Invalid remote certificate while accessing PayPal Sandbox transaction service -


i testing application paypal sandbox.

the uri use transaction https://sandbox.paypal.com/cgi-bin/webscr?cmd=_xclick.

in return page read data paypal form new string send cmd = _notify-validate. when make call https://sandbox.paypal.com/cgi-bin/webscr getting error saying "the remote certificate invalid according validation procedure."

i tried making call https://www.paypal.com/cgi-bin/webscr instead , return t "invalid".

this appears ssl issue: error message caused because process not being able validate server certificate supplied server during https (ssl) request. first troubleshooting step should see if server supplied certificate , every certificate in chain trouble free.


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