Originally Posted by Timbo

I'll bet all of the open F/C seats get filled up with frequent flyer upgrades, so it may not be an issues. You could show your ID to the agent, explain why you are traveling, and ask if there's any chance any one of those seats might be open. Be sure you talk to the Purser too, if you get the stiff arm from the agent. She might be able to move you after the door is closed.