You can customise the receipt header and footer, within the iZettle Pro app. This information is stored on each terminal separately so you can have different messages at different terminals.
To add, remove or edit a header/footer, log into the iZettle Pro app and go to 'Settings' > 'Printers' and tap the 'Receipts' tab at the top.
Next, scroll down to 'Header Text/Footer Text' and enter the information you would like to print out on your customer receipts.
Above: Header text typically used for address and contact details. Footer would usually detail VAT number