My mother’s apartment building has a security desk at the door, which is manned 24 hours a day, 7 days a week, rain or shine, etc., etc. Since there’s always a guard sitting there, rather than taking the time to check their mail by finding their key and opening the box, people constantly asked if the mailman had come by yet. This building houses (rough guess) at least 300 people. Now imagine if, say, 50 of those people asked you every day if the mailman had come by yet. Irritating, right?
So, one of the guards came up with this simple solution. She wrote the question on a piece of paper, tacked it on the wall, and then created a reversible Yes/No sign to hang on the wall.
The only thing that reduces the effectiveness of this solution is that this building houses a group of people who are blind, and I don’t see any braille on that paper.