Mum's Home recommended sew on labels & didn't really like the iron on ones. Fiddly but they stayed. Do take some photos & favourite clothes; you can always add. If she has a mobility frame/stick etc, name that too or put coloured tape on it so it can be recognised if left somewhere. Mum was using the wrong zimmer for a day or 2 when a few got parked up together! Good luck & whatever happens, however it feels it will get easier.