She's been in hiding since she was acquitted of murder charges... Her parents claim not even to know where she is.

But we do know that she'll at least need to be in Florida soon.

TMZ is reporting that Casey Anthony has just been ordered back to the state for her check fraud probation.

She was supposed to start probation last week. But that judge recused himself and turned it over to Judge Belvin Perry, her murder trial judge.

He's given her until August 26th to show up, or face arrest.

But, he has agreed to keep her new address private since she's had so many death threats.

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