I'm having that same problem but the item that I put in a safe place is a set of car keys!
Actually, I'm not sure I put the keys in a safe place at all. I'm not sure I'm the one who lost the keys. The only thing I can say for sure is that the keys are lost.
Luckily, we have a second set of keys.
By the way, this happened with another set of car keys not too long ago. The keys were lost for about a year. Then one day I dropped something on the drivers side floor of my DHs BMW. Had to get out of the car, bend down (put my best side out to the world)to look under the seat for whatever I dropped, and, lo and behold, there were the missing keys!
My husband had been throwing little digs about the lost keys at me for a year, so I was elated to find them and quite happy to let him know who really lost the keys! He took it very well. And no digs this time!