Government Accountability Office warns of counterfeit goods sold online

(CBS) -- Kay Marie learned the hard way about the pitfalls of online shopping.

"I actually ordered a Michael Kors purse on Amazon. I love Michael Kors and I knew this is not real. The texture was different. Pretty much everything was different about it," she says.

Federal investigators say counterfeit goods are flowing into the U.S. and onto some of the biggest e-commerce sites. The Government Accountability Office purchased dozens of items from third-party sellers hosted by sites including Amazon, Walmart and eBay. 20 out of 47 items were found to be counterfeit.

"It's not just shoes or handbags anymore. It's pretty much everything we use on a day to day basis," says Kimberly Gianopoulos with the Government Accountability Office.

Out of nine Yeti travel mugs, six turned out to be counterfeit. One giveaway-two words are misspelled on the bottom.

With Urban Decay cosmetics, out of 13 purchases, every single one was a counterfeit.

The government's advice to consumers is to try to purchase directly from the brand. But if you are buying from a third party, keep an eye on price. If it seems too good to be true, it probably is.

Kay Marie won't make the same mistake again.

"I don't buy anything label on line anymore. I actually try to find it in the store or actually go to their web site to buy it," she says.

The retail giants say they're committed to fighting counterfeits and booting them off the market.