Remember CDOs ? A rigged game invented to use piles of people's mortgage debt contracts and play their financial games with them, ramping up the value and trading them on the markets, Their scheme completely ignored the laws regarding registering the titles and deeds, They invented a system called (IIRC) MERS Mortgage Electronic Registration System, when the investments were subject to scrutiny, Many home owners could not obtain the title on their property because they didn't know who had bought their debt.