For promises Amount:
If collector calls to customer and customer makes promise to pay certain amount and customer also mention the allocation for instalment, charges, and penalty. So collector will record the promise amount to gather with the allocation. Any amount comes under Bills payment from that customer and amount matches with promises amount than system will settle the amount and will make allocation according to the allocation mentioned by customer.
If amount do not match with the promises amount then amount will be available in miscellaneous.