In times when we were "allowed" to modify base app, our own localization included a functionality which allowed us to apply bank account ledger entries. The functionality followed the same programming principles as application process of customer or vendors.
The application functionality was mainly used for applying customer's credit card payments with the actual bank payments received from bank which allowed us to track actual balance of each bank account entry.
We used it for employees (every employee had it's own bank account) as well, but this is not valid anymore since employee ledger has been added.