Told I owe money back on my benefits, marketing coordinator here

I received a letter saying I was overpaid about $300 on my claim. Any experience at all would help. I did not notice any errors at the time. 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.

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