from MSN Money article:
Meanwhile, Massachusetts, in conjunction with 40 other states, is taking on a company that handles rebates. It has sued the nation's largest rebate fulfillment company, Minnesota-based Young America Corp., demanding that it submit to an audit of the uncashed rebate checks it has kept in recent years -- money known in the industry as "slippage" -- in exchange for charging its clients lower processing fees.
Who keeps the uncashed checks?
According to SEC filings, Young America kept $42.9 million in uncashed rebates between 1995 and 2002. Massachusetts Treasurer Tim Cahill believes the company has held onto $129 million worth of uncashed checks.
Cahill believes this practice has provided incentive for Young America to cheat consumers. This money should be turned over to the states' abandoned property divisions so that consumers can claim it, he says.