We document that fact on the Wire/Funds Transfer Payment Order itself. There is a box at the top, containing the verbiage ("An OFAC check was performed and reviewed on this transaction prior to submission and processing") that an officer has to initial. The correspondent bank's wire origination software automatically performs the OFAC check and the wire cannot be originated without someone reviewing the screen(s) and responding appropriately.
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I hear and I forget. I see and I remember. I do and I understand.--Confucius