Perforation of the payment part is mandatory if the QR-bill is to be printed out and mailed. All market participants must follow the set standard and always use perforated paper for printed QR-bills. The payment part and receipt must always be separated from the invoice if the QR-bill is paid at the counter or with a physical payment order. QR-bills that are not made out on perforated paper must be cut off by the customer. An incorrect separation of the payment part and receipt can lead to problems during processing at the post office counter or with physical payment orders.
Details on the design of the QR-bill can be found in the Style Guide QR-bill.