# Webhook Delivery and Retries Webhook notifications are delivered for each event subscribed. ### Webhook Delivery A successful webhook delivery should be acknowledged with **200 HTTP status code**. In case of duplicate webhook requests, *idempotency* should be considered and still acknowledge the webhook delivery with a **200 HTTP status code**. ### Webhook Retries In case of failure or server related errors, the webhook request will be retried with exponential back off delay for **up to 10 minutes**. * Webhook delivery will retry if a **500 or above HTTP status code** is received. * Webhook delivery will NOT retry if **400-499 HTTP status code** is received.