Your probation can be revoked, a warrant issued for your arrest and you can ride out the rest of the probation period in custody.
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Possibel ramifications for failure to report to probation? If it's regular probation, the full sentence that the judge suspended. If it's a deferred probation, the maximum sentence provided by law for the crime the person is on probation for. Could be less. Up to the judge if there's a "revocation hearing" and the defendant loses.
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