Only if it is missed recurring additional pay.
If the employee is owed additional hours that have not been paid, it should be submitted via Payroll Request (ex: Off-Cycle) or through the I-181 time file.
Additional Pay transactions are used to pay an employee a regular flat dollar amount above their base compensation, on a recurring basis. For example, a $500 stipend paid once a month, or once a pay period.
For scenarios in which the employee is owed missed or retro recurring additional pay, such as a retro stipend, then this would be the appropriate form to use.