Got an overpayment notice, what now? - 16 weeks in

I received a letter saying I was overpaid about $500 on my claim. This is my first time dealing with any of this. I cannot afford to repay it all at once. Has anyone disputed one of these?

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

Keep everything in writing and save the confirmation numbers. It saved me later.