# DeliveryRequest

The PerformDeliveryCallback object is used as part of the PerformDeliveryCallback input message. The message requires a request identifier (request).

Parameter | Type | Constraints | Description
--- | --- | --- | ---
RequestID | DeliveryRequest | Required | A unique identifier for the submitted request. Often used for request tracking purposes.
Recipients | DeliveryRequest | Required | A sequence of identifiers comprising the recipient's address and delivery information.
CallbackURI | string | Optional | A string of characters used to identify a system resource. In this implementation, the value should reflect the fully qualified URL used as the recipient of a response (the callback URI) after the document has been generated. The callback is submitted without security parameters.
AccountID | string | Required | A unique identifier for the account associated with the request. This is assigned as part of an account's administration setup process.