Let a scan open your payment page - an invoice, a tip jar, a market stall, a donation link. It points to a checkout you run; we never touch the money.
The code points to a payment link you create with your own processor. We don't handle, hold, or see the money - the scan just opens the secure checkout you already run, so the payment stays entirely between you, your processor, and the payer.
The managed destination can be updated to a new checkout, invoice, or payment link without replacing the printed code.
Point it at a fixed-amount link for a tip jar or donation, or at an invoice page for a specific bill. Whatever your processor supports, the code simply opens it on a scan.
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