A loyalty card is the record of how close a customer is to a reward. That is all it is. The card is not the program, it is the receipt for the program.
Understanding that distinction saves a lot of confusion, because most decisions people think are about cards are really about the program behind them.
What happens when someone uses one
Four steps, whatever the format.
The customer identifies themselves, by handing over a paper card or scanning a code. The business records the purchase as progress. The card shows the new total. Once the total hits the threshold, the customer claims their reward and the count resets.
The differences between card types are entirely in steps one and three: how someone proves who they are, and how they see where they stand.
The formats
Paper stamp cards
A printed card, a rubber stamp, a drawer full of half finished cards behind the till.
They work. They cost almost nothing to start. Customers understand them without explanation.
What they cannot do is tell you anything. You cannot see how many people are collecting, who your best customers are, or how many cards are sitting in coat pockets never to be finished. You also cannot contact anyone, because you never captured a way to.
They are also easy to forge. A rubber stamp resembling yours costs a few pounds online, and you will never know.
Plastic swipe cards
A physical card with a barcode or magnetic stripe, scanned at the till.
These solve the tracking problem and keep the familiar feel. They cost real money to produce, they need a scanner and a system behind them, and customers still have to carry them. For a business with one location the setup usually outweighs the benefit.
App based cards
The customer downloads your app and their card lives inside it.
Full control, full data, and a serious barrier: people will not install an app for a single independent shop. Chains get away with this because the app is used weekly and does other things. A single cafe generally does not.
Browser and wallet cards
The customer scans a QR code, joins in the browser without installing anything, and can save the card to Apple Wallet or Google Wallet if they want it on the lock screen.
This is the format most independents now use, because signup friction is close to paper while the data is close to an app. There is nothing to download and nothing to lose. How the scan and join flow works walks through it.
Paper against digital, honestly
Paper wins on three things. It costs nothing to start, it needs no phone, and some customers genuinely prefer it. If you run a market stall with no reliable signal, paper is the correct answer.
Digital wins on everything that happens after the card is issued.
Customers cannot lose the card, which matters more than it sounds. Every lost paper card is a customer who quietly stops collecting, and you will never know how many there were.
You can see the data. Who your regulars are, how often they come, which ones have not been in for a month.
You can contact members. This is usually the biggest single gain and the one owners think about last. A cafe with six hundred members can fill a quiet Tuesday with one message.
And it cannot be forged, because the stamp comes from your account rather than from an object anyone can copy.
If you already run paper cards and are considering a switch, the migration checklist covers how to honour stamps customers are already holding without annoying anyone.
What goes on the card
Whatever the format, a customer should be able to answer four questions by looking at it.
Where am I now. How much further to go. What do I get. Does it run out.
That last one is the one most cards omit and most arguments start over. If stamps expire, say so on the card, and be generous about it. A year of inactivity is reasonable. Three months is not, and will cost you more in goodwill than it saves you in liability.
Common questions from the counter
Can I have a stamp for each coffee if I buy four? Decide this in advance. Most businesses give one stamp per transaction with a daily cap, which is defensible and easy for staff to say.
I lost my card, can you look it up? With paper, no. With digital, yes, which is a large part of the point.
My friend and I want to combine our stamps. Usually no, because it turns a card meant to encourage one person's habit into a group discount. Say it kindly and say it consistently.
Does it work at your other shop? If you have more than one location, decide early and put the answer on the card. Customers assume yes.
Whether you need one at all
Loyalty cards need repeat purchase to work on. If someone could reasonably come back within a few weeks, a card has something to grip. If your customers buy from you once every few years, the mechanic has nothing to do and your effort belongs elsewhere.
For the wider question of whether a program is right for your trade, what a loyalty program is covers it without the sales pitch. To design one, go to how to create a loyalty program.