SEMINOLE COUNTY, Fla. -- A Seminole County woman was expecting a new insurance card from Blue Cross, Blue Shield, but she got a lot more than that.

The woman said she received a box filled with hundreds of personal, private medical records for other people.

The brown box sitting on her front doorstep Friday morning, she said, didn't look too out of place. However, as soon as the Sanford woman opened it, she found stack after stack of people's private medical records that certainly weren't in the right place.

"In the wrong hands, it is potentially very dangerous," she said.

The woman does not want to be identified, but she says she did order a new Blue Cross and Blue Shield insurance card for her daughter.

It arrived in a Fed-Ex envelope and the brown box was sitting right beneath it from the same South Carolina Blue Cross, Blue Shield location.

"All these people live all over the United States of America. They have no idea that I'm reading their personal information," she said.

Eyewitness News sorted through the documents and found incredibly sensitive information, from peoples' addresses, to doctors, the medicines they're taking, insurance numbers and even their diagnosis.

"You've just violated every law, every law in the medical field by giving a stranger these peoples' medical information. It should've been shredded and it hasn't," she said.

Blue Cross, Blue Shield of South Carolina couldn't immediately say how the information could've been shipped out so haphazardly.

They assured Eyewitness News Friday that they'd rush a representative to her home to pick up the records.

Blue Cross, Blue Shield is investigating internally, using the information that WFTV provided them.

The woman who received the paperwork says she can't hand it over to them fast enough.