If they are being garnished at the maximum amount, then there is nothing you can do but you will need to try to levy other assets or collect another way.
This is not a comprehensive answer and it is impossible to provide a meaningful response without a consultation. Call us for more information. 619.797.5456 www.mataelelaw.com
Mr. Mataele is correct in that you cannot garnish a person's wages when they are already being garnished (certain exceptions apply.) He is also correct when he says that there are other ways to collect, such as a bank account levy, seizure and sale pf personal property, etc.
These other ways require obtaining information about the Debtor's assets, which may require serving the Debtor with an Order to Appear for a Debtor's Exam, with an accompanying Subpoena for documents, or even the services of a Private Investigator.