Can your employer charge you for a mistake? Yes, and he/she can also fire you, no questions asked. (Or you can quit.) Which would you prefer? Paying a dollar fifty or looking for a new job. Your employer does not owe you a job. You owe your employer your best work.
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You can be terminated in Florida for any reason as a result of the at will doctrine. However, the charging for errors can be an issue for the employer makes it a practice to the point that you are paid less than minimum wage.