Told I owe money back on my benefits (update)

I received a letter saying I was overpaid about $1150 on my claim. I would rather hear the honest version than the polite one. The letter mentions an appeal window and a repayment plan. Has anyone disputed one of these?

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

Collect your pay stubs and certification records for the weeks they name. Mine showed the error was a date mix-up.