Monthly bills could require contribution from different people. In the days of electronic payments, it is possible that a group of people share a single bill, but pay their contribution separately. For instance, a small company's employees share a single cellular business plan, but pay their own portions personally.

So the entire total is not paid by one person, and other people in the group paying that person back. Rather, it is a shared bill being paid for by each person in the group, for their contribution. It would be good to use as a tool to track whether other people in the group have paid their share, on time.

The only 'workaround' I have figured is to make a dummy user, called "Celluar Company", that pays the bills and everyone owes that user.