washingtonpost.com: Housing Boom Tied To Sham Mortgages

Many experts have concluded that the nation's real estate boom of recent years was fueled in part by weakened lending standards that sparked excessive demand and drove up prices. Now, some are worried that the looser standards may have permitted a boom of another kind -- a big expansion of mortgage fraud.

No one knows exactly how extensive the crime has become, but new data from the federal government suggest that it has jumped tenfold since 2000. Prosecutors are finding cases all over the country in which sham transactions, based on fraudulent appraisals, led to homes changing hands at far above their real value. Mortgage lenders failed to carry out the most elementary safeguards.