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If your supervisor is making known false statements about your employment, this is considered defamation/slander/defamation and it is grounds for a civil suit against the employer. There is no federal agency to handle this. You have to file suit with an attorney and some attorneys will take the case on a contingency fee basis, but you have to check around for the attorneys because some will want at least a $2000 retainer to take the case.
If you have this report though, many attorneys upon seeing that and proof that you were not fired will agree to take the case on a contingency, since this is retaliation under workers compensation to raise that and it is also false to report you were fired if you were not fired.
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