Troubleshoot and resolve issues with DUPLICATE_INVOICE_ID errors.
Troubleshoot and resolve problems with PayPal® payments that succeeded in your PayPal account but that do not appear in WHMCS.
Troubleshoot and resolve problems with missing PayPal® subscriptions.
Troubleshoot and resolve problems with orphaned PayPal® subscriptions.
Troubleshoot and resolve No Local Credit Card Payment Gateways Enabled errors while using the PayFlow Pro or PayPal Pro Reference Payments payment gateway modules.
Troubleshoot and resolve Details could not be saved. Remote storage failed errors while using the PayFlow Pro or PayPal Pro Reference Payments payment gateway modules.
Troubleshoot and resolve problems due to PayPal® Instant Payment Notification (IPN) failures.