As explained under
They Bill For Us, when a bill is completed, the system needs to check if there are any service providers who bill for us associated with the bills "master" SAs. If so, it sets up the data necessary to interface the master SA's charges to the service provider and to transfer the receivable balance from the customer to the service provider. The system will only do this if you specify an appropriate FT Completion Algorithm on the master SA types. Refer to
SA Type - Algorithm (Bill Completion Algorithm) for more information.
If there are multiple master SAs on a bill, the financial transactions associated with each respective master SA could be routed to different service providers (e.g., one service provider could bill for gas and another could bill for electricity). Refer to
Different Service Providers Can Bill Different Services for more information.