In the operation of an imprest or petty cash, the petty cashier regularly begins each period with the same amount of money. The imprest system is a method of controlling and monitoring small and regular expenses within a company. The system involves providing a fixed amount of cash to a petty cashier at the beginning of a period to cover minor expenses, such as office supplies, postage, or taxi fares. The petty cashier is responsible for recording each expense and submitting the receipts to the main cashier for reimbursement. When the petty cash fund runs low, the petty cashier will submit a request to the main cashier for reimbursement, which is usually equal to the original amount of the petty cash fund. This ensures that the petty cash fund remains at a constant level, and any discrepancies can be easily identified and investigated.