There was no fraud. If the form was incorrect, the employee was merely trying to correct it. The record keeper should have rejected it and sent the employee another form with the correct information for the requested distribution. I find it hard to believe that the employer terminated her for this reason. If there is something I'm missing in the facts, let me know. On the employment side, an employer can normally fire someone with or without a reason and unless the reason violates federal or state law. This does not sound like an ERISA 510 violation.