This solution is only applicable to MYOB AR LIVE users.
The invoice format used by ezyCollect is picked up from the Customers Card file under the Selling Details tab (Please see image below).
In this tab - there is a section called Printed Form. Please set the template branding theme here. This is the format that will be used in the ezyCollect invoices.
Please note: You will need to set this up for each customer in MYOB as the default value.