Had a "thought" today.
Somebody said that bees only belong to you for as long as you can see them.
If a hive swarmed into a neighbour's garden, you probably wouldnt be able to see them.
Neighbour bangs on door..... "Oi, your bees have all come into my garden.."
My response would be,, "wait a minute I'll just go and check" Quick look in garden... bees around hive... perhaps not half as many tho...
say to neighbour,, "no, must be wild ones, mine are still here, do you want to come and have a look? however, if you are worried about a few bees in your garden, I can come and take them away for you...."