I do a pretty high volume of sorting and decided about 3 weeks ago to take a yellow sticker and write "Pennysaved sorted" and stick it on some halves I sorted; I did this for 4 bags I was turning in and 2 halves per bag.
Today, on one of my order pick ups,I found one of the halves with my yellow sticker (although pretty dirty) in a box I picked up.
I thought that was pretty good 3 weeks before it showed back up.
Has anyone else done this and what is the average turn around that you run into one of the previously sorted halves that you have marked?