She said she had no idea why anyone would want to "steal" her identity.
"I'm confused as to why someone would want to steal my life, it's just really weird," she said.
"They must really want something. I just think it's stupid."
More than 80 photos of her friends and children have been posted on the fake site, which have been copied from her friends' Bebo pages.
Whoever set up the page has been adding Mareikura's friends and family, and she is worried the person could cause problems for her with people she knows or even strangers.
"I'm sure they will mail people ... they could cause so much trouble," Mareikura said.
She was concerned it only took three days from the time she closed her account last Saturday until she was told a new one had been set up.
Mareikura's friends are lodging a complaint with Bebo on her behalf.
Sergeant John Cassidy from Rotorua recommended anyone who has a fake site set up in their name to contact police.
He said police tend to receive more complaints about Trade Me users than social networking sites.
In April, owners AOL announced Bebo would either be shut down or sold due to users deserting the site for Facebook and MySpace.
Last week Facebook introduced simpler privacy controls after its settings were criticised.
In May 2008, Bebo users in New Zealand were given full access to other users' accounts.
Various users who logged in under their own account were switched over to the accounts of other users at random intervals, some people gaining access to over 20 different accounts.
