The customer’s card

How to use it

1. 1The customer gets the link by email after a visit, so most of them already have it. There is nothing to install and no account.
2. 2At the foot of the card page are two switches, and they do different things.
3. 3Stop emails from this shop is about offers: it withdraws their yes and stops marketing emails.
4. 4Stop reminders about my stamps is a tick box. It turns off only two reminders: close to a reward, and a reward waiting a week.
5. 5With it ticked, they still get the visit email, the reward code email when the card fills, and your offers if they asked for them.
6. 6When you give a stamp, a customer with an email address gets a short visit email: their stamps, the card, a link to this page and an invitation to reply.
7. 7Replies go to your shop’s own address, not to us. It is free on every plan, and goes at most once a day per customer.
8. 8When that stamp fills the card, the same email says so instead, with the reward and a short code. One email either way: a visit that fills a card is still one visit.
9. 9After you hand the reward over, they get a short receipt naming it, with their new card. Both of these need an email address, and both only go in the countries we may send from — which does not yet include the EU. Nothing stops the card itself working anywhere.
10. 10In those countries the card page also hides Email me this link. Delete my card cannot send its one-time check link either.
11. 11Instead the page tells the customer to ask the shop. You can delete the card from the back office.
12. 12Look at the card with them over the counter. It shows their stamps, how many to the next reward, and any reward waiting, with its short code and use-by date.
13. 13If you have not chosen a reward yet, the card shows the stamps and the code but names no reward. The code still works once you set one.
14. 14A reward lasts 90 days, and the card shows the date. It is good until the end of that day in your shop’s time, so “use it by the 14th” means any time on the 14th.
15. 15Deleting a card takes two steps. Press Delete my card, and we email a link to the address on the card. Open the link within 30 minutes and press again to finish.
16. 16This stops someone who only has the card link from deleting a stranger’s card. Seeing the stamps needs only the link.
17. 17If there is no email address on the card, there is no way to check it is the right person, so the page says to ask the shop. The shop can delete a customer from the back office.

What it does

• At the bottom, the page says who keeps the stamps and that nothing is sold. Under that, unless you are on the paid plan and have switched it off in Settings, one line offers a free stamp card to anybody reading who runs a shop themselves. It opens the KANJIN homepage and tells us which shop’s card it came from.
• The number is shown partly masked. The link is a long random token. The page cannot be guessed, and it shows nothing to a stranger who finds it.
• To replace a customer’s link, open them in the customer list and press Get a new card link, under “Customer lost their phone?”. The old link stops working at once. The new link is shown to you once; copy it and send it to the customer yourself.
• The page is kept out of search engines.
• On the paid plan it carries your logo above your name, and the stamps are pressed in your colour. On the free plan it is KANJIN’s cinnabar red, which is the only place colour appears on the card at all — which is why it is the one thing worth handing over to a shop.
• Above those, a customer who has an email address on file sees “Email me this link”. It sends the card page to the address you already hold for them and to nowhere else — there is no box to type an address into, because the link is the only proof of who they are, and a box would be a way to have somebody else’s card sent to you. Three sends an hour per card. If you have no address for them the button is replaced by a line asking them to give one at the counter; if we cannot email their address, or a send fails, the line says to bookmark the page instead — which they can always do, because they are looking at it.
• At the bottom the customer has two links of their own: “Stop emails from this shop” and “Delete my card”. The first stops that shop emailing them and leaves their stamps alone. The second deletes the card, the stamps and their details, asks once, and cannot be undone.
• Somebody who has stopped your emails sees a different link in that place, from 21 October 2026: “Get emails from this shop again”. It is theirs to press and nobody else’s — there is no control for it in your back office, because a shop ticking a box on a customer’s behalf is the shop’s word for it and not the customer’s. Pressing it emails the address on the card, and the yes only counts once they open that link. If an earlier email to that address bounced or was marked as spam, the page says so and asks them to give you a different one next time they are in: that block is not something a button can lift.
• The last line on the page says who keeps the stamps, and offers a free stamp card to a customer who runs a shop of their own. It is small and grey, it is there on both plans, and it goes to our stamp card page. It is the only thing on the card that is about us.
• A customer who deletes themselves does not need to ask you, and you are not told. If they come back they are a new customer starting at zero, and any earlier yes to offers does not come back with them.
• If the shop is paused — it is not the first shop on its account and it is on the free plan — the card still opens and still shows every stamp. Under the stamps one line says the shop cannot add stamps at the moment and that their stamps are safe, and if they have a reward waiting it says that can still be used. Nothing on the card mentions a plan or a payment. See Your shops.
• Some things survive a deletion, and the page tells the customer which. A record that an email was sent to them, with the address taken off — so you can still say how many emails you sent, and it names nobody. A scrambled copy of their email address, if their address had ever been stopped: they asked, or an email bounced, or it was marked as spam — so deleting them cannot put a stopped address back on a list. And one line in our own record for each time their data was exported or deleted, or they asked to stop, holding that scrambled address and the last four digits of their phone number, so each of those can be shown to have happened. None of it can be turned back into their email address, and none of it can be used to contact them. Until October 2026 this page said nothing was kept except the stop-emails request, which was wrong twice over: most customers had never made that request, and the other two were not mentioned. A later read of the function found two more errors in that correction: a bounce or a spam complaint keeps the scrambled address too, and the record holds a line for each export or request, not one line for the deletion.
• Below the card, if your Google review link is saved, every customer sees one line and one button: “Honest reviews help new people find” your shop, and “Leave a Google review”. It is the same for everyone, whatever their stamps, and it sits apart from the stamps and the reward so it never reads as a stamp for a review. Nothing is offered for it. Turn it off on the Reviews screen, under On each customer’s card page.
• Under that, a small note shows how to save the card to the phone’s home screen: on an iPhone, tap Share (or ⋯, then Share), then Add to Home Screen; on Android, tap Chrome’s own menu (⋮), then Install and create shortcut or Add to Home screen. Both name the old and the new label, because newer iPhones keep Share under ⋯ and Chrome renamed its menu item in 2026. The card then opens like an app, with nothing to download. The customer can press Hide, and that phone remembers it. The note is not shown when the card is already opened from the home screen.
• The last line of the card has a small link for customers who run a shop themselves: “Run a shop? Get a free stamp card.”
• An earlier version asked customers to add the card to their home screen, so it could send notifications. That was removed. The home-screen note today asks for nothing: no permission, no app from a store, and the card works the same if it is ignored. Chrome’s “Install and create shortcut” only puts a shortcut to the card on the phone.
• The card page is in your shop’s language once that language is checked, and the review button and the home-screen note are in it too. Every language KANJIN has is checked: 繁體中文, 日本語, Español and Français. Français is Quebec French. “Email me this link” was added in October 2026 and was English-only for part of a day: it appears only where its words have been checked, so it was not shown in the other four rather than shown in English on a translated page. All five have it now.
• When the newest stamp on a card came from a friend the customer sent in, the card says so, under the count. It never says who came in. The line is about the newest stamp only, so it goes as soon as that customer visits again.

Related screens