<prompt> Human: I purchased a used car 2 weeks ago. Today the finance officer contacted me stating there was a mistake on the interest rate and it has gone up by .2 and now asking me to come back in to re sign paperwork. Is this a scam?! Ive already signed and have good credit its been 2 weeks. Any advice?  <response>: You didnt get approved for the original loan terms.You can either sign under the new terms OR return the vehicle.Up to you. 