Having a yard sale? Check your bills.

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WICHITA, Kan. (KAKE) -

Summertime and garage sales go hand in hand. On almost every street corner, you can spot the signs. 

"Trying to make a little extra money...We're working on zeroscaping, so I was hoping for a little extra lawnscape money," says Rachel Parrish.

A few extra dollars. That's all Rachel Parrish wanted last weekend when she set up her yard sale in North Riverside. 

"It wasn't until I was getting ready to take the bills to the bank that I thought, this doesn't feel right," she said.

She says a man in his mid 50's came to her yard sale and chatted with her, even complimenting her yard. Then, he bought a few small ticket items and handed her a fake $50 dollar bill.

"I fell for it hook line and sinker," says Parrish.

Just houses down from her, another yard sale is now set up for this weekend. The seller is now on high alert.

"I think I don't want to take anything over a $10 first of all," says Nancy Mueller.

A small security thread runs vertically through cash. If it's not there, the bill is fake. Many are also using markers that change color if marked on a counterfeit bill. 

Another easy way to tell is by feeling a bill. Real money is made with special paper that's rough and thicker than regular paper. If it doesn't feel right, it's probably not real. You should also report any counterfeit money to police.