It’s not too often your neighbor has a similar looking pet. Cats are harder to tell apart, mostly because they’re all jerks and they will never respond to their given name.
One New Zealand man found himself in an interesting situation when he took a cat he thought was his to the vet. He was told to keep the cat in a room for 5 days to recover. Towards the end of the recovery, his actual cat casually walked into the house.