We are getting this email sent to us: " Please check your server that handles PayPal Instant Payment Notifications (IPN). IPNs sent to the following URL(s) are failing: https://www.ourwebsite.com/ipn/notify If you do not recognize this URL, you may be using a service provider that is using IPN on your behalf. Please contact your service provider with the above information. If this problem continues, IPNs may be disabled for your account.
We have no idea how to solve this issue.
Normally, when someone registers a new listing with us, Paypal will notify us about the sale, then using the same code, we will verify with Paypal the payment details and if it is OK with them, then we will activate the account.
Similar process with recurring subscriptions. Paypal automatically triggers the payment notification after 1 year, and we give the account a fresh expiry date.
However now, suddenly, after we receive the notification, and verify with Paypal, there is a failure. So the same code that is working for new registrations seems not compatible with recurring payments. This failure is problematic for us, because the result is our system’s update of the expiry date doesn’t get triggered unless Paypal verifies.
We have tried to debug but we did not reach a solution. So for now, every time our coder gets such an error report, I will manually ask Paypal to confirm that the payment has entered our account, and we can then manually extend the expiry date.