If you use software for accounts payable and creating invoices, the first thing you should do is contact your software partner. They will provide you with all the necessary information on the software update.
You can create QR-bills yourself and print them out on white, perforated paper for delivery. PostFinance will provide you with a QR generator. QR-bills that you send as a PDF by e-mail to invoice recipients are exclusively intended for payment via e-banking and mobile banking.