Dune said "correct their mistake. If they order and the delivery comes to your door just say we didn't order from you and leave it at that. Your neighbour will soon learn to give proper directions to their place. "
Aww, I though you were going to say not to correct them and just take the food and eat it. I was thinking it but didn't want to be the first to say it, LOL.
OP: We were having that problem last year when a neighbour ordered lots of food and they had a hard time finding the right how because of the numbering and the way the houses are oriented. I would start with a sticky or big numbers like other have suggested, and if that doesn't solve the problem maybe talk to the neighbour?