I would have put it in the freezer. Here’s why:
Nearly 20 years ago, after I’d returned home from a hospital stay, I heard a knock at the door but I was coming out of the shower and by the time I got there, all I saw was a wrapped tray of lasagna. And it was gorgeous… but since it was of unknown origin and the usual suspects (everyone who I’d thought might have done something like that for me) denied any knowledge of it, I wound up throwing it out. About a week later I heard from a work friend who let me know she had left it… she meant to email me since I didn’t answer the door, but then her kid totaled his car and… well, she just had other things on her mind! I kept thinking that I should have frozen it and waited a bit longer to see if the mystery would be solved.
You know… I bet Nest or some other doorbell security cam company could make a great ad from this kind of scenario!