Got an overpayment notice, what now? - what worked for you?

I received a letter saying I was overpaid about $150 on my claim. It has been a long 26 weeks. I did not notice any errors at the time. Are payment plans possible?

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

I asked for a waiver and a plan in the same call, and they gave me both forms. It was less scary than I expected.