Possibly. Though I could also argue that I've been in contract negotiations where drafts are edited by both parties and passed back and forth, yet one party's l

Possibly. Though I could also argue that I've been in contract negotiations where drafts are edited by both parties and passed back and forth, yet one party's letterhead remains on the top. In other words, I could say the letterhead does not, as a matter of accepted convention, indicate that one party was the sole drafter.