A national gambling watchdog group has raised new concerns about lottery scratch cards sold in Ontario, charging that current practices are unfair and misleading to the consumer.The Gambling Watch Network filed a letter with Ontario’s ombudsman complaining that scratch tickets are sold even after the top prizes have been won. Brian Yealland, the group’s spokesman, said retailers should stop selling tickets if the buyer has no chance of winning the jackpot.(CBC) "People go on purchasing those tickets although they have no chance of winning, and it seems to us that this is a breach of the understanding one has in buying a ticket," Yealland said. This practice has been the subject of scrutiny and lawsuits in the United States, causing some state lotteries to include disclaimers on the tickets explaining that some prizes may already be won. In Iowa, instant win tickets are pulled from stores once the grand prizes have been claimed, said Tina Potthoff, a spokeswoman for the Iowa State Lottery. "We want to make sure our players have a chance to win the top prize every time they purchase a ticket," Potthoff said. "If by chance a top prize is missing and they only have a second- or third-tier prize, we feel that’s false advertising." A spokesman for the Ontario Lottery and Gaming Corporation said players can call a toll-free number printed on the back of each scratch and win ticket to find out which prizes are still available to be won.