Casey reported Wednesday evening to Florida authorities to begin serving a one-year probation on an unrelated check fraud conviction, officials said.
She came in, but the Florida Department of Corrections offered no more details including where she is. A news conference was scheduled for this morning.
Corrections spokeswoman Gretl Plessinger had earlier said the agency will not disclose where Anthony will report to probation, as a safety precaution.
A Florida appeals court on Tuesday denied a request that would have stopped her from being forced to start the probation by the end of the week.