You can determine what appears on the footer of your invoices in Settings -> Invoice -> Layout
If you're using Stripe to take payment you can add something like:
_____________________________________________
You can pay your invoice online by clicking on the link below:
##PAY_INVOICE_BUTTON##
Alternatively, please pay via BACS, as below:
Account Name: Your Practice
Sort Code: 00-00-00
Account Number: 12345678
Payment terms are strictly 30 days
_____________________________________________
which would appear on your invoices like this:

If you're using Stripe to take payment you can add something like:
_____________________________________________
You can pay your invoice online by clicking on the link below:
##PAY_INVOICE_BUTTON##
Alternatively, please pay via BACS, as below:
Account Name: Your Practice
Sort Code: 00-00-00
Account Number: 12345678
Payment terms are strictly 30 days
_____________________________________________
which would appear on your invoices like this:

Published on: 25 / 11 / 2020