Upload a proof-of-address document
Attaches a proof-of-address document to the banking application, for the cases where the partner asks for one. The application must already exist and have an individual on it, so complete the application first.
**Two things reject uploads that otherwise look fine.** A `.jpg` file must be sent as `fileType: "jpeg"` — `"jpg"` is refused. And the partner caps the *decoded* size at 10MB, even though their own upload page advertises 20MB; oversized files are rejected here before the round-trip.
`fileContent` accepts either a bare base64 string or a `data:` URL, so a browser `FileReader.readAsDataURL` result can be passed through unchanged.
Free.
ConnectorOAuth