# Verification callbacks

Callback events are used to authorize and manage your verification requests and return verification results.

## Verification Request Event

 - [POST VerificationRequestEvent](https://developers.sinch.com/docs/verification/api-reference/verification/verification-callbacks/verificationrequestevent.md): This callback event is a POST request to the specified verification callback URL and is triggered when a new verification request is made from the SDK client or the Verification Request API. This callback event is only triggered when a verification callback URL is specified in your dashboard.

## Verification Result Event

 - [POST VerificationResultEvent](https://developers.sinch.com/docs/verification/api-reference/verification/verification-callbacks/verificationresultevent.md): This callback event is a POST request to the specified verification callback URL and triggered when a verification has been completed and the result is known. It's used to report the verification result to the developer's backend application. This callback event is only triggered when the verification callback URL is specified in your dashboard.

## SMS Delivered Event

 - [POST SmsDeliveredEvent](https://developers.sinch.com/docs/verification/api-reference/verification/verification-callbacks/smsdeliveredevent.md): This callback event is a POST request to the specified verification callback URL and is triggered when an SMS delivery receipt is received. It is used to report the final delivery status of the verification SMS. This callback event is only triggered when a verification callback URL is specified in your dashboard.