Thank you for the information and your question. What you described is a violation of both Arizona and Federal wage laws. I have provided the text of the Arizona law below. In addition, under the Federal Fair Labor Standards Act, even if the employer could make deductions for damages because the employee
had agreed ahead of time, their wages for a pay period cannot fall below minimum wage
So, your son can file a wage claim with the Arizona Labor Department and can find out how to do so at: http://www.ica.state.az.us/Labor/Labor_WagClm_main.aspx
Please let me know if you need any clarification. I would be glad to assist you further if I can.
23-352. Withholding of wages
No employer may withhold or divert any portion of an employee's wages unless one of the following applies:
1. The employer is required or empowered to do so by state or federal law.
2. The employer has prior written authorization from the employee. An employer shall not withhold wages under a written authorization from the employee past the date specified by the employee in a written revocation of the authorization, unless the withholding is to resolve a debt or obligation to the employer or a court orders otherwise.
3. There is a reasonable good faith dispute as to the amount of wages due, including the amount of any counterclaim or any claim of debt, reimbursement, recoupment or set-off asserted by the employer against the employee.