<a href="http://www.usatoday.com/money/economy/housing/2010-09-27-mortgages27_ST_N.htm?csp=usat.me">Paperwork mistakes that led one of the nation's largest mortgage  servicers to halt foreclosure evictions in 23 states last week have  happened elsewhere and affect tens of thousands of foreclosures, say  lawyers for homeowners.</a>