Sticky notes are security nopes

from here and here (image source)

Over half of employees write down passwords on sticky notes. That's a scary statistic. Any passerby, anyone peeping in a window, anyone who gains unfettered access to your office immediately also gains access to everything you can see on your computer and on the network if your password is prominently displayed out in the open. Why bother having a password at all at that point.

It's not that you should never write a password down, it's just that there are safer and more secure ways to record them than on sticky notes.