Why do you want to log dual received anyway? It isnt' required for anything, and does you no good. You must have an instructor sign your LOGBOOK (not the company training records) for any dual instruction given. I have never heard of any airline instructors signing anybodys logbook. Just log it as a required crewmember, sic or pic as appropriate. Forget about dual, unless you are getting a BFR in a Cessna.