The difference between a wallet notification and an SMS is that the first is free and attached to a card your customer chose to keep, while the second is paid and lands in an inbox crowded with advertising. Notifications are for people who joined; SMS is for reaching those you cannot contact any other way.
Two channels that look alike and work on opposite logic
Both appear on a lock screen, and that is the whole of what they share. An SMS goes to a number you bought or collected, and the customer agreed to nothing in particular. A wallet notification goes to a card the customer added themselves, which is explicit consent they can withdraw at any moment by deleting it.
That difference in permission changes everything downstream: who reads, who is annoyed, and what a mistake costs you. An irritating SMS gets ignored and your number stays on their phone. An irritating notification makes them delete the card, and at that point you have lost the channel, the balance and the customer together.
The comparison in full
Free and conditional
- No per-message cost, however many customers you have.
- Reaches only people who added the card — an audience that chose you.
- Appears beside their balance, so context arrives before the words do.
- Deleting the card cuts the channel permanently, with no warning.
Use for: balance reminders, a reward that is ready, seasonal campaigns.
Paid and universal
- Reaches everyone whose number you hold, enrolled or not.
- A per-message cost that multiplies with every campaign.
- An inbox crowded with banks, shops and your competitors.
- Carries regulatory obligations around commercial messaging.
Use for: enrolment invitations, operational alerts, people without a wallet.
The cost across a year
The gap looks trivial on a single message and becomes a budget line once you multiply it by your customer count and your campaign count. Here is a conservative example for a mid-sized shop sending twice a month:
| Channel | Messages a year | Approximate cost |
|---|---|---|
| SMS | 24,000 | A recurring, fixed operating cost |
| Wallet notification | 24,000 | Zero |
| Both together | 48,000 | You pay for the SMS alone; notifications cover members |
But cost is not the strongest reason to move. The strongest reason is that a notification arrives carrying its own context: the customer opens the card and sees four stamps out of six. An SMS arrives naked, and has to explain itself in eighty characters against twenty other promotional messages.
When to use each
Use a wallet notification
- To remind someone they are one or two stamps short.
- To announce that a reward is now ready to claim.
- For seasonal campaigns aimed at people who actually joined.
- For anything recurring, since the cost does not move with volume.
Use SMS
- To invite past customers who do not hold the card yet.
- For an urgent operational message: a changed time, an emergency closure.
- When reach matters more than cost for one particular occasion.
- For anyone who declined the card but still accepts messages.
The cleverest arrangement is not choosing one but sequencing them: a single SMS inviting people to join, then everything afterwards through the card for free. You pay once to convert a number into a permanent channel instead of paying on every campaign forever.
Three rules that protect the free channel
- Never send anything unrelated to their balance A notification about a general offer reads as an advert; one about their stamps reads as a service. That difference is the difference between staying and being deleted.
- One a week is a ceiling, not a target Better still, tie it to customer behaviour rather than to your calendar: an absence past double their rhythm, or a completed reward.
- Watch the deletion rate after every campaign A rise following one particular message is an explicit verdict on it. That figure is the only thing that tells you when you crossed the line, and it beats any guess.
The third rule separates the merchant who keeps a channel for years from the one who burns it in three months. Enrolments climb slowly; deletions spike suddenly after a single bad message, and nothing tells you except the number.
Common questions
Does the customer need an app to receive notifications?
No. The card lives in the wallet built into iOS and Android, and the notification comes from there the same way a boarding pass update does. That is worth saying out loud at the till, because the most common objection is the assumption that something must be downloaded.
What if the customer deletes the card?
The channel closes immediately and you cannot reach them through it again, which is precisely what makes restraint an economic decision rather than a moral one. Winning them back needs another channel or another visit, and both cost far more than the message you did not send.
Which gets a better response rate?
The notification, usually, because it reaches an audience that opted in and it carries their balance as context. But the comparison is unfair to begin with: SMS addresses a wider and colder audience. Compare each channel against itself over time rather than against the other.