Overpayment letter from the unemployment office after 10 years as a bank teller

I received a letter saying I was overpaid about $900 on my claim. There are 10 people counting on me, so I am trying to be careful. I cannot afford to repay it all at once. Who should I talk to first?

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