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It was an employee, however that is irelivant as it won't be coming out of her pocket, the difference being... if I paid that back in one lump sum, I would lose over half of my wages, I would not be able to pay my rent, meet other financial commitments or put food on the table. It is the responsibility of the employer to ensure my wages are correct. Nobody is saying that they won't get their money back, but to cause undue hardship for no good reason is really not ethical and in this situation, most likely illegal.