SSI is not normally garnishable for child support but SSD is. However, there are several other factors to consider in your fact pattern. It sounds like the fundamental issues is in actually receiving child support that goes beyond the SSI/SSD issue. You should consider using a profession to get the issue resolved. At least consider a free consult on the matter then weigh your options. You're in tricky territory - better to have a professional on your side.
Evan A. Nielsen is licensed to practice law in California. The information provided here is for educational purposes only and is not intended as legal advice for a particular matter. This response does not create any attorney-client relationship with the author. For specific advice about your particular situation, please consult an attorney.