Bank
Printed beside the QR code on every document the house issues.
Document fingerprint
Scan the QR code with your phone's camera and this page opens and checks the document. For a digital copy, paste its verification link.
What this check confirms
A matching fingerprint means the reference, the account, the period and the figure on the document have not changed since the house issued it. It is not a current-balance check, proof of who holds the account, or a substitute for confirming a document with the Desk.