You can determine what appears on the footer of your invoices in Settings -> Invoice -> Layout, under Invoice Footer. To take payment via Stripe, you'll need to include either the Pay Link or Pay Button within your invoice footer, which can be accessed using the VAR dropdown.

When using Stripe to take payment, you could add something like: 

_____________________________________________

Online payment is preferred:

##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