Leaving the Amount Blank on a QR-Bill: When It Is Allowed

Normally a QR-bill states the amount to pay. But in some cases the amount is left blank and the payer fills it in — most commonly for donations and membership fees.

When a blank amount is allowed

Blank amounts are permitted for donations, contributions and membership fees where the payer decides how much to give. For ordinary invoices, the amount should always be stated.

The QR-bill specification allows the amount field to be omitted, which leaves it to the payer to enter a value when they pay.

The intended use cases are voluntary payments: a donation form, a membership drive, or a contribution request where there is no fixed invoice total.

For anything with an agreed price — goods sold, services rendered — a blank amount is not appropriate, because the invoice already fixes the sum that is due.

• Donations and contributions.
• Voluntary membership fees.
• Not for standard goods or services.

Why the amount is normally pre-filled

A pre-filled amount removes the chance of the customer paying the wrong sum. The whole point of the QR-bill is that the payer does not have to type anything except approve the payment.

When the amount is filled in, the customer cannot underpay or overpay by accident. A blank field invites exactly that kind of error.

A stated amount also speeds up payment, because the payer’s banking app shows the total and asks for a simple confirmation rather than a manually keyed figure.

For bookkeeping, a stated amount means the payment comes back with the correct value attached, so reconciliation stays clean.

The risks of a blank amount

A blank amount invites errors and requires the customer to enter the correct figure. For anything but genuine donations, always pre-fill the amount to protect your cash flow and avoid disputes.

A customer may enter the wrong amount and pay too little, leaving you to chase the difference, or too much, forcing a refund and a correction.

Payments without an amount are harder to reconcile automatically, because the paid value may not match any single invoice in your system.

A blank-amount QR-bill that is then paid without an invoice reference can float as an unmatched payment, creating exactly the manual work the QR standard is meant to eliminate.

Best practice

If you must issue a blank-amount QR-bill, still state the expected amount in the accompanying letter or invoice body, so the payer has a clear reference.

Keep the blank-amount form for genuinely voluntary payments — donations and membership fees — and use a fixed amount everywhere else.

When you receive a blank-amount payment, match it to the corresponding pledge or membership record so it does not sit unmatched in your bank feed.

If you are unsure whether a blank amount is appropriate, default to stating the amount. A fixed amount is always safe, while a blank one is only correct in narrow cases.

• Blank amounts are for voluntary payments only.
• Always pre-fill the amount for goods and services.
• State an expected amount in the covering letter.
• Match blank-amount payments to a pledge or membership record.