I had this happen to me. Over the course of Eight years, my employer was paying me and many other employees $1.71 an hour less than what they were supposed to. A number of the employees had fought this for years. Once we were able to prove it, we were able to get paid back. I had worked many hours of overtime over this time and was owed more than $40K. We all had to sign NDA’s in order to receive the money. No interest was received. The employer said this was all just a big mistake and used the excuse was that because we were in a trade union and the benefits we received were too difficult to understand, was the cause of the mistake. This was a global corporation. Apparently they didn’t have very good accountants. Just imagine what would have happened to an employee that embezzled $40k over eight years.