Scotty one of my most used “stickies” just disappeared on me this morning.
No great loss but it had my passwords listed for quick use. All of a sudden it just
vanished! As you recommended I have all passwords store in a file in Numbers.
I have tried everything I can think of and used every technique I’ve found online
but nothing worse than. Any ideas? No rush at all……
Thanks!

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Most of the time, it's just a case of accidentally minimizing the top bar of the stickie then it only appears as a thin bar on your desktop. Then to make matters even more tricky, it's possible to have slid or moved that bar to the bottom or side of the desktop screen, therefore making it even more difficult to find. If you see any small think line like the example below, just double click it and will expand back to normal.




If you don't see that, try quitting Stickies several times in a row and watch for changes around your desktop. My bet is that it's there, just way out of sight.

If that doesn't work, the good news is that when you close a sticky by using the top left corner of the note, it will always ask you if you'd like to save. So you can't just "lose" a note without really going out of your way. The resulting file is a .txt file saved on your computer somewhere. So you could search in a finder window for .txt and it will reveal every text file on your computer, one of which will be that saved sticky. A better approach however would be to search for content within the note itself. In other words, search for a word that existed in the note and that .txt file will show up. It's best to use words you think my be unique to that specific document for more accurate results.

Keep in mind, if you DO find the .txt saved file, you'd have to open it (default will be text edit) then copy/paste the contents back in to a new sticky.