More than likely, the garnishment will stop because the CP (your mother) will be deceased, and I'm sorry to put this bluntly, but then this person will no longer exist to receive the money. However, depending on the state laws where you live, YOU may still be entiteld to this money since dad owed this CS and it should have been paid while mom was still alive and responsible for your care. This is a debt, and as an heir to your mother's estate, you may still be entitled to it on her behalf. Similarily, you may still be able to continue the original order for payment by "keeping it active" in the court system......again depending on your state law, a child can actively continue a child support order beyond the age of 18 (for how long depends on your state's statute of limitations) for payment if the NCP failed to pay the CP as ordered. This money was intended for your care, and even though you've now reached the age of 18, this does not "automatically erase" the NCP parent from this debt......alot of states allow the child to still pursue the original order beyond the age of majority on his/her parent's behalf for money that was intended for him/her in the first place....and if you collect, you get it.