What's the most frustrating thing you've found while spring cleaning?

That time of year again.

I'm an eejit when it comes to keeping track of my passports. To the point that the passport office issued me a 12 month passport after my 3rd lost one. I had to earn the trust again, but I'm back on full privileges again!

Frustrating thing is that every time I do a spring clean I find the previous passport I'd reported lost.