You can send a QWR to ask for information regarding the servicing of your loan or to dispute errors about your loan account for first mortgages, but not for second mortgages or lines of credit. You should try to resolve any dispute, no matter what kind of mortgage you have, with your servicer first. For additional assistance with any kind of mortgage, you canfile a complaint with the CFPB online or by calling 1-855-411-CFPB (2372), orcall 1-855-411-CFPB (2372) to be connected to a HUD-approved housing counselor.