Stamp success messages are great for letting your customers know how many stamps they have left until they receive a reward. This notification will appear directly on your customers' lock screen.
In order to set this up properly, all you need to do is make sure you keep the placeholder:
{#}
in your message.
For example,
Only {#} more stamps until your reward!
Collect {#} more stamps to receive your reward!
{#} stamps left until your free reward!
Important: do not replace the '#' with a number.
Correct way: "Only {#} more stamps until your reward!"
Incorrect way: "Only {3} more stamps until your reward!"
