If we cash a savings bond for a non-customer, would we need to fill out a CIP form for them. I think no, but have had some differing opinions.

Thanks in advance.

No. You just answered your own question with the term "non-customer."

But wouldn't you have to run an OFAC check on the non-customer? We were told by our auditors that we have to peform an OFAC check on every non-customer transaction.

Yes, you would have to run OFAC (depending on your risk assessment), but the person in this example is a non-customer, so CIP rules do not apply.

CIP and OFAC, two separate things.