A couple years ago I went to Europe with my family and a friend, and I found a pigeon feather in Danmark that I wanted to draw, then I forgot I had it in my bag. It was in a little ziploc bag the whole time though. But it ended up traveling to 6 different countries while we were there, and Canada, then finally back to Oregon.
I actually did not find the ziploc bag with the feather in it until two weeks ago! And I still have not had the time (sadly) to draw it yet. But it is currently in that same bag, now labeled with all the collection information, displayed on one of the cork boards on my bedroom wall. Which is part of why I want to know if I could get into trouble for this accidental event? It has happened before with a mouse that got into our car in Canada, but we drove back to where it got into the car and released it.