Two questions restaurant owners actually ask: can my staff steal from me, and what happens to my records if things go wrong. Here are both answers.
Billing fraud in restaurants is rarely dramatic. It is a bill voided after the guest paid cash.

Five roles and more than forty individual permissions. A waiter takes orders. A cashier settles bills. Neither can change a menu price.
Voiding a bill, editing a payment and changing a price each need permission. A manager can override, and the override is recorded against their name.
Logins, price changes, voided bills and permission changes are recorded with the user, time, IP address and device.
Every record carries your restaurant's identifier and every query filters by it. Another restaurant on the platform cannot reach your numbers.
Passwords are stored hashed, never in plain text. Sessions expire. An account locks itself after repeated failed login attempts.
Removing something marks it inactive rather than erasing it, so an accidental deletion is a support call rather than a disaster.
We will walk through exactly what each of your staff would and would not be able to do.