Legal Question in Credit and Debt Law in Michigan

Re: company will not provide address to stop calls for a debt my son has

You can ask them for the name of their company and a phone number and research it on the internet. Tell them that your son will call them, and have him take care of his business from a pay phone, if need be, to stop them harassing YOU. Tell them that you will NOT carry any more messages.

Tell your son to get another number, a cell perhaps, and give that to them. Then he can get the information and deal with this himself. The primary thing is that he needs to give them another number: if he chooses not to take care of his business, then at least you're not being hassled.