Why use stamp cards?
Stamp cards turn a repeated product purchase into a clear goal. Customers collect stamps as they buy qualifying items, see their progress build over time, and receive a reward when they reach the target.
Business outcomes
Stamp cards are useful when you want to increase purchase frequency for products that customers naturally buy again, such as coffee, bakery items, lunches, or refills. The visible balance gives customers a reason to return, while the completion reward can encourage the next purchase without discounting every transaction.
They can also support related objectives. Other campaigns can issue bonus stamp entries into the same wallet, so actions such as completing a profile or joining a promotion can help a customer reach the reward sooner.
When this solution works best
This solution works best when the qualifying products are easy to identify, the target feels achievable, and the reward is clearly connected to the repeat-purchase habit. A simple proposition such as “buy six coffees and receive €3 off your next coffee” is easier to understand than a program with several targets or exceptions.
An Item Count Wallet is designed for this use case. Like other wallets, it holds a customer balance and receives wallet entries. Unlike a Points Wallet or Competition Wallet, it also has its own internal purchase mechanic: each matching product purchase can add stamp entries directly to the wallet, and reaching the configured target can issue a reward. A basic stamp card therefore does not need a separate campaign to create stamps.
Tradeoffs and risks
The main operational risk is product matching. The product barcodes configured in the wallet must match the GTINs sent by the point of sale, webshop, or app. If they do not, purchases will not add stamps. The audience, stores, channels, timing, and treatment of promotional items also need to match the intended proposition.
Reward economics matter as well. A target that takes too long to reach can make the wallet feel inactive, while a reward that is too generous can make the program expensive. If bonus campaigns also issue stamps, include those entries when modelling how quickly customers can complete the card.
Design choices to make up front
Start with the qualifying product set, target, reward, and whether the card should repeat after completion. Decide whether one product unit should represent one stamp and confirm that quantity data is sent consistently by every participating sales channel.
Use the wallet's built-in qualifying-product mechanic for the core stamp card. Add other campaigns only when you want to issue bonus wallet entries for a separate behaviour. Keep those campaigns easy to explain, set suitable reward limits, and make sure every bonus entry goes to the correct Item Count Wallet.