Severance and unemployment, do they overlap? - 2 weeks in

I was offered severance of 13 weeks after being let go as an accounts payable clerk and I am unsure how it affects benefits. Thank you in advance. I have a mortgage and need to plan. Who should I ask before signing?

Before signing, I asked a friend who is a lawyer to look at the agreement. It was a short conversation and worth it.

Rules differ by state. I called the claims line and asked directly, then wrote down the answer and the date.