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PayPal IPNs Failing 12th Feb 2020 (PP-LIVE-13006)

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Dear all,

We are aware of an issue at PayPal processing IPNs, which will impact WHMCS users. PayPal have opened the following event to track the issue:




The impact is that not all payments made via PayPal during the impacted period can be recorded by WHMCS.



Payments will be received into your PayPal account, but transactions will not be recorded and invoices marked paid.

The Billing > Gateway Log may not contain any reference to the payment


The Billing > Gateway Log may show an IPN Handshake Error Result.

The debug data may contain a 500 Internal Service Error towards the end.



1. Transactions can be recorded manually in WHMCS https://docs.whmcs.com/Transactions#Applying_Payment_to_an_Invoice

2. Once the incident is resolved you may be able to request the failed IPNs are re-sent: https://developer.paypal.com/docs/ipn/integration-guide/IPNOperations/#resend-ipn-messages

When manually entering transactions it is important the PayPal transaction IDs are entered correctly so as to avoid duplication when re-sending IPNs at a later date.


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