I found a gas bill in collections on my credit report. It is not mine, we have lived in the same apartment for 12.5 years and it is electric only. I disputed it with Equifax , the only credit agency that showed the bill. They said it 's mine because the collection agency gave them additional information. No one in California would know my information to be able to get a gas bill in my name unless they stole it somehow. No other credit in my name has been opened that I can see. My credit is spotless with no late payments and I would like this taken off my account. I am not sure how to prove it 's not mine since I have no documentation of any kind, having not opened this account.