To ensure cash receipts are collected in their entirety and deposited on a timely basis, please ensure the unit managers are reconciling the validated deposit slips returned from the bank on a regular basis, and that they are depositing the cash receipts on a timely basis.
In addition, it is important to restrict and review the usage of the negative operating keys (voids, cancels, no sale, etc.) that are available on the POS registers so that they are not abused. The key to controlling cash receipts at the register is to conduct surprise cashier audits on a regular basis. Each cashier should be audited at least once a month.
The credit card numbers and the expiration dates should be masked on all receipts (customer and merchant), including any batch reports generated in the office. Please sample some of the credit card receipts to insure PCI compliance.
MyFinance users can further research use of voids and other items using the "Readings + Adjustments" report which can be found under Sales & Revenue > Reports.