Notes from the counter
Less than almost every loyalty programme collects. Counting to nine needs a card, a number and somewhere to keep it — none of which requires a name, an email address, a birthday or a postcode. Everything beyond the count is collected for some other purpose, and that purpose is worth being able to say out loud.
Last updated 26 August 2026
What the count actually requires
A stamp card is a number attached to a card. Stamping increments it; reaching the target releases a reward and resets it. The mechanism needs to tell one card from another, and nothing else.
A paper card does this with no data at all — the card is the record, held by the customer, and the shop knows nothing between visits. A digital card replaces the paper with a stored count, which is the point at which somebody decides how much else to store alongside it.
That decision is not forced by the technology. A wallet card can hold a count against an anonymous identifier for its whole life and work exactly as well as one attached to a full customer record.
What each extra field is really for
Every field beyond the count is collected for a purpose other than counting, and each one is worth naming honestly.
- An email address is for reaching someone when they are not in the shop. It is a marketing capability, not a loyalty one.
- A name is for the greeting — on the card, or at the counter. It changes how the thing feels and not what it does.
- A birthday is for an offer on a date. It is worth having only if something is actually sent on that date.
- A postcode is for knowing where customers come from. It answers a question about the business rather than about the customer.
- A phone number is usually collected because a form had a space for it.
None of these is wrong to collect. The useful discipline is being able to say which question each one answers before the field appears on a form — because a field nobody can justify is one nobody will use, and it still has to be kept, secured and eventually deleted.
Data has a running cost, not a one-off one
Collection feels free. Holding is not. Anything stored about a customer has to be kept safe for as long as it exists, produced if they ask for it, and removed if they ask for that — and a business cannot hand over or delete what it never wrote down.
The quietest version of this is the inactive record: someone who joined once, never came back, and whose details sit in a database for years afterwards being of no use to anybody. It is the most common thing a loyalty database contains.
A card that knows nobody
A loyalty card can be joined without an account, without an email address and without a name. What the shop then holds is a card, a count, and a history of visits with no person attached to it.
The trade is real and worth stating plainly: nothing can be sent to that customer, and if they lose the pass there is no way to prove it was theirs. Whether that trade is worth making depends on whether anything was ever going to be sent — and for a great many shops, honestly, it was not.