A payment is three weeks overdue and the invoice sitting in Xero already has a QR reference number generated for it, the same code the client's bank app will recognise the moment they scan it. Swiss QR Invoice built into a Zap through Zapier is what puts that reference number together in the first place, alongside a creditor reference and, where needed, a full payment part and receipt. None of that reaches the client on its own, that part comes from Mobile Message sending the actual text.

Overdue Sales Invoice from Xero is the natural moment to lean on this pairing. Create QR Reference or Create Payment Part & Receipt runs in the middle of the Zap, formatting the payment details correctly, and Mobile Message closes the loop with a text that includes the reference the client needs to pay. Parse QR Invoice Document works the other direction, pulling the fields off a QR bill someone has already received so the numbers can be checked or logged without retyping them, and Create Creditor Reference formats the creditor side of the same document.

None of these actions send anything by themselves. What they do is get the payment details into a shape that is ready to be texted, so the reminder that reaches a client carries the exact reference their bank needs rather than a vague nudge to pay up.