# Attachment

The Attachment object contains the requested file as an attachment and includes the display name and instance file name

Parameter | Type | Description
--- | --- | ---
AttachmentDoc | base64Binary | Container object used to pass base64 encoded attachments.
DisplayName | string | The external PDF that is passed in.
InstanceFileName | string | The document display name associated with the document instance. This is authored as part of REQ authoring (Document > Properties).