To cancel an unpaid invoice and issue a credit note:
1. Open the Countingup app and tap 'Get paid’ at the bottom of the screen
2. Tap ‘Unpaid’ in the ‘Invoices and payment links’ list
3. Find and swipe left on the invoice you want to cancel
4. Tap 'Cancel'
5. Confirm by tapping 'Cancel invoice'
6. Choose if you want to send a credit note to your customer or to yourself using the toggles
7. Tap 'Send email' to issue your credit note