Pass update
A pass update refreshes the contents of an existing Wallet pass. It can change the displayed stamp balance, for example, without issuing a new card.
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What this means for your shop
With a digital card, recording an action and displaying it can happen at different times. Your team records a stamp while the customer’s phone still shows the previous balance. That does not mean the stamp is missing. Recording it again would count the same purchase twice.
A pass update is also different from a new registration and from a visible notification. The card can show new contents without an alert appearing on the lock screen. A notification, in turn, does not replace checking the recorded action.
How to recognise it
After a purchase, a customer opens their card and still sees the old balance. Check the response in the staff app and the connection first, and scan again only if the stamp is actually missing. That way you tell a missing record apart from a card that has not refreshed yet.
Apple’s archived Wallet guide explains that updates are not guaranteed to arrive, for example if there is no connection or pass updates are disabled. Google also documents updating card contents; the display time can differ between devices.
At Treubar
Treubar updates the Wallet card’s stamp balance automatically, so there is no new card to issue. If the customer’s screen has not caught up yet, the staff app shows what was recorded. The guides to Apple Wallet and Google Wallet explain the respective processes and limitations.