Your ex must be related to my ex.
It is against the law to give out a false address, you should contact the police in regards to that. They can provide you with what to do in case other parties show up looking for your X.
You should also pull your son's credit report and check it. You can also put a watch on it, if needed.
If you have not already you need to lay down the rules with him. Let him know you are done and that you are not his friend, alibi or enemy. Let him know he needs to stop using your address and you have reported him to the authorities. If you can, stop your son's visits with him. And let him know if he wants to see DS then to take you to court. File the contempt charges against him for not paying CS and make sure you have all of your custody papers in order.
