2Checkout sends the first Instant Payment Notification (IPN) instantaneously for events per your account’s Notification Settings.
1
Stage 2
If the initial notification fails, the subsequent two (2) IPN messages are sent after the next five (5) minutes.
2
Stage 3
If the issue persists, and requests continue to result in failures, 2Checkout makes another four (4) retries, 15 minutes apart.
4
Stage 4
Following the four tries made in Stage 3, the 2Checkout system performs one-hour interval continuous requests for a maximum of two (2) days after it sent out the initial notification, until a valid response.
