Where's my coat?

We all have NHS issued work coats. They all look the same, and we have all at some time or another put someone else coat on and not realised until we are downstairs in the car park, put our hand in our pocket and thought, '***t these are not my keys, this is not my coat'. Then having to trail back up the stairs to the office to find the correct jacket.......

I put this little cat broach on mine so NO-ONE takes my jacket and haven't had that problem since!