Make a Commission Arrangement Complaint Your information Title* First name(s)* Surname* Previous names (if any) Date of birth* Current address* Address we currently hold for you Postcode Postcode we currently hold for you Previous addresses Please include postcodes Telephone number* Phone number we currently hold for you Email address* Your agreement number(s)* Please enter the numbers of the Santander Consumer Finance agreements for which you require information. If you don't have this information please supply the registration numbers of the vehicles concerned. Normal monthly instalment* Tell us about it Please give a description of your complaint and how it’s affected you*