She said she took items from the site, where hot rock, volcanic ash and noxious gas had buried the ancient city and its residents when Mount Vesuvius erupted in the year 79.
Nicole's letter -- which accompanied a package containing two mosaic tiles, parts of an amphora and a piece of ceramics -- said she had experienced a string of bad luck since the theft that included two bouts with breast cancer.
"Please, take them back, they bring bad luck," she wrote.
The woman said the package contained everything she took from Pompeii, except for a tile she had given away to a friend.
"We are good people and I don't want to pass this curse on to my family, my children or myself anymore," she wrote. "Please forgive my careless act that I did years ago."
The package was sent to a travel agent in Pompeii with a request that the items be returned to the park.
A spokeswoman for the archaeological park said there have been about a hundred previous incidents of tourists sending Pompeii artifacts back to the city along with apologetic notes claiming the objects were cursed. The park has established a museum to display the returned items and the letters from apologetic tourists.
