<prompt> Human: Yesterday, I received a letter from a debt collector stating that I owed a bill for an ambulance ride. Since Ive never used an ambulance before, I called the number provided in the letter. I requested that they confirm what information they had about this bill. The collection agent read off my name and birth date and claimed they had a signature. The last 4 digits of the social security number they had was not mine. He also asked me if I had ever been homeless, which I have not. He gave me the address in which the ambulance picked up the person, the date of the ride and hospital that the person was dropped off at. I started to believe that my brother had been the one to give them all this information because of the area in which the address was located and the fact that he is homeless. The debt collectors say that I need to prove that the social security number isnt mine for them to quit trying to collect from me. Should I do this? If so, how should I do this that is safe?The debt collector mentioned that since it isnt really my social security number that they have that it wont go on my credit report. Is this a true statement? I pulled one of my free reports yesterday and there isnt anything currently appearing in the collections section. I also called the hospital the person who used the ambulance was dropped at to make sure they didnt have me down as having any outstanding bills.Anything else I should be doing?  <response>: I would not give my ssn to them. Then they have your number and can report it to your account. 