Earlier this month a regional court found the 53-year-old, who worked at a nursery school for 15 years, guilty of defrauding the public sector.
It emerged she had completed five years of primary school instead of six as required. The case has caused uproar.
The appeals court released her on humanitarian grounds pending a review of the conviction by the Supreme Court.
In recent years, cleaners in Greece have been prominent in protests against austerity policies. Many clashed with police after their jobs were cut.
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