The National Insurance Crime Bureau (NICB) said today that “slip and fall� claims targeting businesses and their insurance companies are beginning to be scrutinized more carefully for potential fraud. An analysis of questionable slip and fall claims submitted by NICB member companies showed a 57 percent increase in the number of referrals over the past two and a half years. More than 4,600 questionable claims were received in 2008, 2009 and the first half of 2010.