American Mortgage Field Services billed Fannie Mae for as many as 100,000 foreclosure inspections a month at the height of the housing bust. The frenzy came to a halt after its owner's arrest last year, however, amid a scandal that ultimately led to his imprisonment for running a fraudulent home inspection business.

It turns out that the Spring Hill, Fla.-based company had faked most of the work it claimed to have done on behalf of Fannie. The cost of its $13 million fraud is a rounding error compared to the more than $4.7 billion the government sponsored enterprise spent keeping up foreclosed homes last year.

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