How to control Overriding predefined pay/invoice rates by Internal Staff?

If you wish to stop users from overriding the predefined rates while validating shifts in the Confirm Shifts Screen, follow these steps:

2. Uncheck the option highlighted in the screenshot below: Allow Shift Rates Overridden by staff while shifting Verification.

By doing this, users won't be able to override the predefined rates during the shift validation process.