After her surprise announcement that she won't finish her term as Alaska's governor, Sarah Palin has resorted to Facebook and Twitter for subsequent comments.

But she warned supporters to avoid imposters pretending to be her online, particularly a Twitter user called "EXGovSarahPalin" whose mix of copycat and false updates have confused some.

Gov. Palin's official account is "AKGovSarahPalin," which has more than 80,000 followers.

She has posted more than a dozen messages since her press conference Friday, including links to letters from her and her attorney, updates from a weekend fishing trip ("Grateful Todd left fishing grnds to join me this wkend; but now he's back slaying salmon & working the kids @ the site; anxious to join 'em!") and July 4 shout-outs to Alaskans and military families.

At first glance, the Twitter page for EXGovSarahPalin is similar, down to the user photo and background image. As of Tuesday 3 p.m. EST, it had only 162 followers. Its bio reads "Making change from the outside," in contrast to Gov. Palin's "Creating New Energy for Alaskans as governor of the 49th state."

The fake Palin tweets also include copies of some real ones.

"Unfortunately fake 'Gov Sarah Palin' twitter sites r doing their thing today:unscrupulous, untrue- so sorry if u recv false info @ fake site," reads an EXGovSarahPalin post time-stamped 14 minutes after Gov. Palin wrote the same message.

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