On XX/XX/. I walked into Carmax with a preapproval letter from XXXX XXXX. I had already chosen my vehicle online and gave them a pre-qualified credit authorization form. I made it very clear upon purchasing that I only wanted to use XXXX XXXX. I was offered several times other financing options, and I made clear I did not want my credit to be run against any other report other than XXXX XXXX. Upon checking my credit report, I found Carmax ran my credit through their system without my authorization. I went to the location and spoke to them about it, and the manager XXXX had informed me that it mustve been a mistake because of a click of a button. I found this to be unacceptable and unlawful. The credit authorization form through Carmax only has an electronic signature that I did not authorize, which is also illegal.