From time to time, I do small engine work. Mostly on lawn mowers, mostly for regular customers. Occasionally, one of my regulars will give my name to someone and I'll get an "outside" job.
A few days ago, an Ariens tractor showed up with a box of new blades sitting on the seat. Not one of my regular machines. No idea when it showed up or who it belongs to. No note or contact information.
Pretty obvious what they wanted done, so I did it.
I guess eventually someone will show up looking for it. If not, I've got a free mower...