Ask a Lawyer and Get Answers to Your Legal Questions
If you do not have a written agreement authorizing the withholding for the debt covering what happens if she is terminated or leaves, you should not withhold more than the $150 already agreed to. There are significant restrictions on making wage deductions under the FLSA. If you want to push the envelop a little, you can withhold so much of the check such that the amount she receives in gross pay is not less than the minimum wage per hour. You will probably have to sue her for the balance of the funds she owes.
If this answer is responsive to your question, please accept it. That is how we are compensated. I would also be appreciated if you provided feed back on your view of the answer. Finally, if the answer was especially helpful you can provide a bonus. If I can be of further assistance or you have other questions in the future you can ask for me and reach me at this site.
This communication is not intended as legal advice. A local attorney should always be consulted for legal advice. No client/attorney relationship is intended or created by this communication.