QR-bill
Mandatory standard since the payment slip was retired. Check both directions: issuing invoices with a QR code and reading incoming QR documents — the second is missing more often.
More terms under Invoicing, payment and banking: Advance payment Allowance for doubtful debts Bad debt camt.053 Cancellation invoice Cash discount Certificate of shortfall Credit note Creditor Current account Debt enforcement Debtor Default interest Delivery note Dunning eBill Final invoice IBAN Invoice number ISO 20022 / camt Open items pain.001 Part payment Payment term Pro forma invoice QR reference QR-IBAN Quotation Receipt Tips TWINT as a payment method Visitor taxes