I usually play detective and knock on a few doors. If that doesn't work...NSN. And then I write on the package "Please put some numbers on your house". If the customers complains, I ask them kindly to go to Wal Mart and pay the $.97 for some numbers to put ON THE HOUSE!
That's what I do, except I do, NI1. I have suggested to people that if someone at their house were to have a heart attack, they could die while the ambulance was looking for the correct house.
I have 2 places on the route that I am on now that I had been guessing incorrectly for over 6 months. The owner of 1 of them confronted me while I was on the metro.
Him: where is 14412-133rd St
Me: last place on 133rd or the left.
Him: Why don't you leave them there?
me: I do.
Him: no you don't, that's my neighbors shop you are leaving them at, mine is the quonset hut with the 2 dogs chained to it.
me: you mean the 2 guard dogs that won't let anyone by them.
Him: They're harmless.
me: I've heard that tune before, everytime I got bit. Maybe you want to put the numbers on your building and tie your dogs on shorter chains. And if you are seeing me put the package at the wrong spot, how about saying something when I am there or walking past the dogs so I don't get bit.
Him: the dogs don't bite. Do I need to call UPS???
me: yep.
I never heard anything about it, so I doubt he called.....
The other one, the neighbor took them to the correct house and they all put numbers on their houses after about 4 months (driveway with 6 houses, but the numbers are all at the end of the driveway.)
TB