Improper claims for unemployment insurance in Wyoming have nearly quadrupled since 2008. The Wyoming Workforce Services Department documented $2.5 million in overpayments in 2010, up from $1.15 million in 2009 and $644,000 in 2009. The number of unemployment fraud cases jumped from 652 in 2008 to 2,012 last year. There were 811 such cases in 2009.