We had an estate sale for my in-laws here in Stillwater in 2014 when they moved into assisted living. Included in the sale was my FIL's registered engineer seal (looks just like a notary seal squeezy thingy). About two years ago, it turned up at a garage sale in OKC. Someone recognized his name and affiliation with ODOT and they knew someone who knew him and got it back to him. Pretty cool story!