Last time I went to the ER, they checked me in under the completely wrong name. Like it wasn't even close. Luckily I noticed the wrist band was wrong and pointed it out, but they then had to re-do tests since they had been done under the other person. It really makes me think how bad that could have been though. What if I went unconscious, and they used the info on the wrist band to look up medical history? What if they gave me medication based on that incorrect history? And at the very least they wouldn't have the right emergency contact info...