# Legal Requirements
# Display of a QR Code on a POS display
To conform to the document issuance obligation (Belegausgabepflicht) it is sufficient to display the bill in the form of a QR code at the POS display and an informal declaration of agreement by the customer.
To document the declaration of agreement of the customer we recommend an active confirmation by the cashier at the POS display.
# Scan of the QR Code in the anybill app
If the customer authenticates by scanning the QR/barcode contained in the app, the customer automatically declares his agreement to the digital receipt. This agreement is automatically documented through the scanning process.