For example, customer ID #CUSID only generates orders for Plesk licenses, we have to go to the order and process it so that an invoice is generated every month for every subscription.
But, resellers like ID #RESID that also sell Plesk licenses never get orders but get only invoices. How can we force invoices to be created in all customers?
The difference lies in the type of the customers: #CUSID is Provider's Customer and #RESID is Reseller. They have different billing scheme. In this document you may find general information about orders and invoices of PBA-S, this scheme is used for all customers:
Here you may find the details about reseller's specific properties: