Hopkirk when you go through training at RM you are taught to deliver to the address, requardless of the name on the envelope. If that name has gone away from that address, unless there is a official redirection in place, then it is up to whoever lives there to either send it on under cover of another envelope, or return it to post office as gone away or not known at this address. If then there is a return address on the outside or inside it will be returned to sender free of charge.