02/06/2014 11:29 EST | Updated 04/08/2014 05:59 EDT

Super mailbox thieves now using keys, says Surrey victim

A Surrey, B.C., woman says the thieves targeting her super mailbox are getting so sophisticated they now appear to have copies of the keys, enabling them to steal mail whenever they please.

Christine Larsen says she furious about the lack of security her super mailbox has.

"We've been broken into five or six times," says the Surrey, B.C. resident.

Larsen says the first few were simple jobs involving a crow bar to get inside the community mail box, but then she says, "They seemed to get hold of the actual key."

Now, Larsen says, they can come and go as they please.

"We don't know when we're going to get hit again."

Canada Post offers to change locks

Canada Post spokeswoman Anick Losier says the company will change the locks free of charge.

She says mailbox theft is a small problem across most of the country, but a big one in B.C. A CBC News investigation found thousands of super mailboxes have been targeted across the province in recent years.

"Half of any incidents reported in Canada, are in the Lower Mainland."

"Especially in the Lower Mainland we are dealing with highly organized, highly-equipped individuals or groups of individuals," says Losier.

Losier says the company has developed higher-security boxes to replace the old ones in problem areas and that it's working with police to catch thieves.

"Certainly we as well as local authorities are very much aware of it and just trying to develop new ways to deter these activities."

"If you see something suspicious please report it to Canada post or your local authority."

Meanwhile, the union representing postal workers says the theft problems will persist — unless the company reconsiders its plan to replace home delivery with super mailbox in all urban areas.