Difference between Invoice Summary Customer and Recipient in ByDesign ?

Dear ByDesign community members,

I have a question in regards to invoice summary data of Account master.

My understanding is that only those customers who have a role of "invoice summary payer" will affect invoice summary run, and other roles "invoice summary customer" and "invoice summary recipient" are maintained only for reference.

To me, invoice summary customer and invoice summary recipient are the same organization because they are responsible for the order, but they just do not pay for the summary invoice.

I would like to know the intended meaning of those 2 roles.

Thank you,

Yamato T.