Told I owe money back on my benefits - what worked for you?

I received a letter saying I was overpaid about $600 on my claim. I have read a lot of threads here and could not find my exact situation. I cannot afford to repay it all at once. Has anyone disputed one of these?

Read the letter for the appeal deadline and act on it, even if you think you will end up repaying. Then ask about a payment plan.