There's a stamp on my receipt — what is it?

The shop runs a stamp card — buy a set number of something, get one free — and that purchase just earned you a stamp. You didn't have to sign up for it, and you don't have to do anything now.

The block near the bottom of your receipt draws the shop's card: one circle per stamp, filled in the shop's colour for the stamps waiting on this phone and left open for the ones still to come, then one more circle at the end with a gift in it — that's the reward. It's the same card, drawn the same way, as the one in the app. The line underneath says what the reward is.

On a card with a lot of stamps the circles are drawn smaller so the row always stays on one line. On a very long card we print the numbers instead, because circles that small would be no use to anyone.

Why it says "waiting"

The stamps are held against this browser, not against you, because we don't know who you are yet. Install the free app and sign in, and every stamp waiting here lands on a real card — including ones from earlier receipts on this phone.

Two different clocks, and only one of them is short

• The stamps last 30 days.
• This receipt link lasts 48 hours.

So the link can go dead while the stamps are still perfectly fine. If you come back to an expired link, it will still tell you how many are waiting and how to keep them — you haven't lost them.

If you don't install the app, the stamps sit here and eventually run out at 30 days. Nothing is charged and nothing is sent to you.