The absolute, and I mean Disney villain level worst, is when the resident doesn't give the shipper a good phone number. We had one customer do that a few years ago, we called and called and called thinking the box just wasn't set up and they would pick up the phone eventually but they never did.

They have to be held at the post office because of the instructions on the box and expectation that the customer is going to pick them up ASAP. The entire box died before the customer got there 2 days later. Just wretched people.