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It is understandably quite upsetting to receive a review based on false information, but it's not illegal. In general, no laws regulate the performance review process. This is so because of the default rule in Florida that employment is "at will" absent an express agreement to the contrary. At will employment can be terminated for any reason not amounting to discrimination on the basis of a legally protected trait (race, religion, gender, etc.) or retaliation for engaging in certain forms of legally protected conduct (filing a wage claim, taking FMLA leave, etc.). It doesn't matter whether the basis for termination is fair, reasonable or even TRUE. So, since employers don't need a fair reason let alone a true reason to fire an employee, they don't need a review to substantiate the decision. As reviews serve no legal purpose and in most cases have no legal significance, the law simply does not regulate them.
All you can do is submit a written rebuttal to try to get the review changed or at least to have the rebuttal included in your personnel file so that your side of the story can be seen. But your employer is not legally required to listen to you or legally required to include anything you give them in your file. Again, this is just not a process that the law has any control over at all because as an at will employee the employment realtionship can be terminated at any time.
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