An External Account Document is a document uploaded by the customer to help prove they own an external account. Examples include an image (or pdf) of a bank statement or a driver's license. This object is only used in rare circumstances, e.g., a customer has reached the maximum number of allowed external accounts and they need to swap an existing external account for another one.

View the External Account Endpoint Reference →

externalAccountDocument Object

Property	Data Type (length)	Description
`customerId`	integer	The Helix-assigned unique ID for the customer who uploaded the document.
`documentContent`	string (10MB)	A base64-encoded representation of the actual content of the document. NOTE*: Applicable only when POSTing to the /externalAccountDocument/upload route. This property will not be returned by any route. Base64-encoding should be done using the RFC 4648-compliant encoding (i.e. no embedded line breaks and use `=` as the padding character). See RFC 4648 for more information.
`documentName`	string (50)	A caller-specified, user-friendly name for this document. Maximum length is 50 characters. Must have one of the following extensions: `.jpg` `.jpeg` `.gif` `.png` `.pdf` `.heic`(please note that `.heic` files will be converted to `.jpeg` before we store them in helix)
`documentType`	enum	The type of document. Possible values include: `DriversLicense` `BankStatement`
`externalAccountId`	integer	The Helix-assigned unique ID for the external account to which this document is associated.
`reasonType`	enum	The reason for uploading the document. Possible values include: `NameChange` `AddressChange` `Unspecified`