DENVER -- Counterfeit money is popping up at yard sales in Denver. Sellers have been ripped off and are warning others about the fake cash.
In the past three weeks, dishonest shoppers have targeted yard sales along Downing Street in Denver's Washington Park neighborhood.
"When I was posting my listing for my yard sale, I noticed some of my neighbors mention they had experiences with people trying to purchase things with counterfeit bills and they didn't find out until after the fact," said Kelly Rush.
Rush took extra precautions to protect her money. She bought a counterfeit detector pen to verify the authenticity of high dollar amounty cash.
"I had a gentleman purchase my mountain bike with a hundred dollars," said Rush. "I was happy to do it when I found out it wasn't fake."
The Federal Reserve rolled out new $100 bills in October 2013. In order to thwart counterfeiting, a blue security ribbon and a color changing bell were added. Texture from raised printing is also a new security feature.
The Secret Service investigates counterfeit money.