Overpayment letter from the unemployment office - any advice?

I received a letter saying I was overpaid about $600 on my claim. I would rather hear the honest version than the polite one. The letter mentions an appeal window and a repayment plan. Are payment plans possible?

If you are unsure, free legal aid in your area may help for this kind of notice.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.