If you know where he lives go there, no need to give him notice, he will fob you off permanently otherwise as he knows what is coming.
leaving it up to him to contact you about it means he never will. Put it in writing if needs be and slip it in his door if no one answers, you could even txt it to him, but face to face is the preferred method for this type of thing.
Do not wait, delay, hope he will contact you. Grab this situation by the balls.