Excerpt: A woman in Denmark played a high stakes game last week when she successfully convinced a bank to exchange bills worth two thousand "kronor" in Swedish Monopoly money for a quantity of real Danish money.

But the 61-year-old may be left needing a "get out of jail" card after a second attempt to exchange the toy cash backfired.

The fraud attempt began on Thursday, when the woman entered a branch of the Nordea bank in Svendborg and handed over two fake bills. When the teller failed to spot that the Swedish bills were far from authentic, the woman walked away from the counter with a cool 1,400 Danish kroner ($240),...