With Tappr you can add notes to custom amounts at checkout. Any text added to the note field of an item appears on your digital receipts and in your payment history. Note: Some of these features are only available on iOS.
If you've set up items previously you can access your product library by swiping from right to left (iOS only). Once in your library, you can add items to your check out. Or for a custom sale, just enter the amount using the keypad.
From there tap Item Description (pictured below).
Once in the description field add your notes (i.e. special customer) and tap Done (pictured below).
For more information on how to add notes to payments via the Tappr App, please watch the below video.