get
https://gateway.stage.bill.com/connect/v3/payments//check-image
Get an image of an existing check sent to a vendor.
The check image is available when the vendor bank processes the check payment. BILL checks in with the bank every 30 minutes to get the check image. The image file format is determined by the vendor bank.
From the response, use downloadLink in a GET request to download the front and back images of the check.
curl '{downloadLink}' --header 'sessionId: {session_id}' --output {check_name}