My 18 year old son doesn't live with me, but he can't receive mail where he is or use it as an official address. He needs to replace his driving license and he was going to put my address in but I get a single persons discount on my council tax. He had our old address on it before (when we all lived together and he was under 18). If he uses my address can it be used as 'evidence' that he lives here? His mail (not that he gets much) goes to his work or gets forwarded to me. I'm not looking to avoid tax but he lives 70 miles away but needs an actual address.