Long story short;
Long ago---pre DIAD--- I'm doing a rural route cold. I have a package for an address...and I find a row of 6 rusty mailboxes where the stop should be, with 3 gravel driveways heading up into the dark woods.
Each 1/2 mile long driveway had 2 houses, none of which were marked and no one was home. I spent 20 minutes driving around this potholed nightmare and couldnt find one address. So I left a delivery note in the mailbox and sheeted the package as "unable to locate."
The customer called in a complaint and was obnoxious and rude, saying that "I need to learn to do my job" and "the regular driver knows what the hell is going on" and "we have never had a problem getting our mail."
2 weeks later Im on the same route, with another package for the same customer. I still dont know which house he lives in, but I find a neighbor to indirect it to. I leave a note in the box again, stating that his package had been indirected and what address I left it at. What I DIDN'T do...was indicate the name of the person I left it with.

This customer therefore had the pleasure of trying to do MY job and spend 20 minutes of HIS time to find the address I left it at....in the dark.
Some time later, when I did the route again, I noticed that these addresses were all clearly marked with signs on each driveway.