<prompt> Human: Recently, when working through a mortgage refinance the bank mentioned my credit score. It was 100 points less than what Credit Karma showed.The bank said normal credit scores and mortgage credit scores are different and that Credit Karma is normally inacurrate.They could not tell me how mortgage credit scores differ.So, do they differ?If so, how?Is Credit Karma inaccurate?  <response>: There are many different scores for many different purposes. Credit Karma and other sites only show a few of those scores and most arent available to the general public, nor is the algorithm behind how they work. 