One time at a previous company I worked for, the owner had a "down-on-their luck friend" do an install for us to help save costs and give them a bit of cash.
They loaded the 4x8 polymetal sign face their self and their two ladders on top on their small trailer and strapped everything down and headed out.
The install was 4 hours away, they stopped at the rest area about 1.5 hours north for a RR break, and noticed that their trailer only had one ladder on it.
Yes, only one ladder. No ladder or 4x8 sign face.
They immediately called and let us know, then started driving back south looking for what happened to everythign else...
The owner there started driving north at that time also, neither ever found any trace of either.
I also traveled the same route every day (lived 2 hours north at that time) and never saw it either or heard anything on the news.
I am amazed no one was killed.