Preventing Mistakes in Personal Amount Field Credit card transactions processing

Summary:

Is there any way to configure Oracle Fusion Expenses so that employees receive an alert or validation when filling out the Personal Amount field?

Currently, if an employee uses a corporate credit card for business expenses but accidentally enters an amount in the Personal Amount field while submitting their expense report, the system automatically creates a debt against the employee record and reduces their reimbursement amount. This then requires correction by financial operators.

Is there a solution or best practice to prevent employees from making this mistake — for example, by adding a validation, warning message, or restricting entry in this field unless it is truly personal spend?