Imprest petty cash book: In this type of petty cash book, some fixed amount is given to the petty cashier, considering the maximum sundry expenses that would have to be paid. This amount with the petty cashier should not be more than the predecided amount, at any time. At the end of this fixed period, the petty cashier gives accounts for the amount spend to the head cashier, who examines these accounts and pays the petty cashier the total amount expended. Thus, the petty cashier has a fixed amount (imprest) at the beginning of every specified period.