Aria automatically searches for the Notification Template Group to use and applies it based on the following processing sequence:
Note: If there are multiple Master Plans, Aria will select the first Master Plan on the invoice regardless of whether it has a Notification Template Group assigned or not. If the first Master Plan on the invoice does not have an assigned Notification Template Group, Aria will then check for a Client Default Notification Template Group, then the Client default template of the 'invoice' class.