I think that game should remind you whenever your claim is currently studied by someone else. Currently it is easy to forget about this especially if you are a newer player.
We have a warning system for when siege weapons are located near your claim, but I'd argue that stolen bond reminder is equally important.
...or just make claim ownership transfer entirely voluntary, like it works with hats now. It takes no effort to stop someone from stealing your claim, you can only lose it if you either do not know about this mechanic or simply forget about it, so why it should be a thing at all?