RCMP are investigating a passport mix-up that involves a teenager from Manitoba and people in Halifax and Vancouver.

Laura Harrison, who lives in Lac du Bonnet, Man., northeast of Winnipeg, received a package in the mail this week that she expected would contain her teenage daughter's passport.

But inside the package, she found the passport, identification and other material belonging to a person who lives in Vancouver.

Harrison found the passport's proper holder on the social-networking website Facebook and sent her a message.

"I went on Facebook to tell this girl what happened — I got her stuff in my mail — and then when she replied back, she says, 'Oh my gosh,' she says, 'I got someone else's too, some man's passport.'"

"The same day, my daughter went on her Facebook, and then some girl e-mailed her and says she has her passport in Halifax."

Harrison worries about what is happening with her daughter's personal information.

"They're going on about this security stuff … and this is so confidential," she says. "It goes in someone else's hands, you know, some kind of criminal, they [could] take your identity or something."

Passport officials told Harrison to mail the package they received back to the office by Express Post.

But Harrison's husband took the package to the RCMP, which is investigating, she said.

Her daughter has still not received her proper passport, which was ordered in December in preparation for a trip in March, Harrison said.