Used to run his hand under peoples desks and find bunches of them with passwords written on.
I remember once I had to go to our IT department because my account was messed up at work. My friend that works in the department asked for my password and I replied "123" he was like "really funny Kat what is your real password". I was like no joke that is it...it kept me from being the one to write it on a post it note
I don't use the same computers here at home to get online or do work on. I have so many accounts for various systems at work that have to be changed every 90 days, that like you, I just write them down and store them in my safe at work.
lol - Ive seen that too. Under the desk, funny
The last place I worked in IT tech support was a small local Government office with about 100 staff. Often I'd get to their computers to fix something and they wouldn't be there but I could often work out their passwords from what was written on post-it notes or other things around their desk. Most would use a formula, so once you worked it out, you knew how it would change each month.