TOIL should be confirmed AFTER the week is complete.
If hours are confirmed prior to this, the employee will not have all hours accounted for and at this point may have worked less than their contracted hours, giving them a negative TOIL balance.
Always refer to your company's TOIL policy/procedure
When taking TOIL leave, what does a TOIL day look like for an employee? Consider the following before approving;
The employee's Working Pattern
Leave Hours credited Per Day (employee profile > Leave)