The wire is coming from Iran and he says it's inheritance money ($80,000). The wire was rejected once already.
I have to be honest about this. You are playing with fire either way. Who is the originating party? How sure are you that the originator isn’t on the SDN List? Even if they're not, how can you possibly document that from an EDD perspective?
From what I recall, the Iran sanctions were mostly prohibited. So, it appears that you have already handled it appropriately by rejecting the wire. However, given all the recent updates to the Iranian and NPWMD Sanctions, I would clear any transaction directly with OFAC prior to accepting the wire.