Partial authorization: when a card covers part of the sale

A declined card isn't always a dead end. Partial authorization is when the customer's card issuer approves only part of the sale, usually the balance left on a prepaid or gift card, and your terminal asks for the rest in another payment. The customer keeps their basket, you keep the sale, and nobody has to put items back on the shelf.

It sounds small. At a busy register it saves a lot of awkward moments, and it saves sales that would otherwise walk out the door.

How does partial authorization work?

When you run a card, your terminal sends the full amount to the card's issuing bank. Normally the bank approves or declines the whole thing.

With partial authorization turned on, the bank has a third option. It can say, "I'll approve this much." That's typically the balance on the card.

Your terminal then shows the approved amount and the amount still owed. The cashier collects the remainder with cash, another card, or EBT if the items qualify.

Here's a hypothetical. A customer brings a $42 order to the counter and pays with a prepaid card holding $30. The issuer approves $30. The screen shows $12 remaining. The customer hands over a ten and two ones, or taps a second card. Done.

Without partial approval, that same card would simply decline, and the cashier would have to start guessing at the balance.

Which cards use partial authorization?

It shows up most with prepaid cards. That includes network-branded gift cards, reloadable prepaid cards, and some payroll or benefit cards.

Regular debit cards can sometimes get partial approval too, if the customer's checking account has less than the sale amount and the bank supports it. That's less common, and it depends on the bank.

Credit cards usually approve or decline in full.

Your cashier doesn't need to know which card is which. The terminal handles the response. What matters is that staff know what the screen means when it shows a partial amount, and don't mistake it for a completed sale.

Does your setup support it?

Not every terminal, POS, and processor handles partial authorization the same way. It needs support at several points in the chain: your reader, your POS software, and your processor.

If you're not sure, ask the NRS Pay team what your setup supports. They can tell you how partial approvals show up on the NRS POS and what your cashiers will see on screen.

If your setup doesn't support partial approval, there's a manual workaround. Ask the customer if they know the card balance. Run the card for exactly that amount. Then collect the rest separately. It's slower, but it gets the sale done.

What should staff do when the screen shows a partial approval?

Train for three things.

First, read the screen. The cashier should confirm the approved amount and the balance due out loud. "The card covered $30. You have $12 left."

Second, collect the rest. Offer cash or another card. Don't hand over the bag until the full balance is paid.

Third, if the customer can't cover the rest, void the partial payment. Don't leave a partial sale hanging. A void tells the issuer to release the hold on the card, so the customer gets their balance back. The customer's bank decides how quickly that release shows up, which is worth mentioning to the customer.

A short laminated note by the register helps new cashiers. So does a reader that's fast and reliable. See NRS Pay equipment for readers that work with the NRS POS.