This essay considers the ethical implications of arbitrator resignations. The resignation of an arbitrator “can severely disrupt an arbitration, particularly if it occurs at a late stage of the proceedings” and can cause “delays and significantly increased expense” resulting from replacement efforts, possible suspension of proceedings, and even the repetition of hearings. Given its potential impact on the parties and the arbitrator's own liability and reputation, “resigning from office is a serious decision, and should never be taken lightly.” Ethical issues connected with resignation have traditionally been given less prominence than discussion of conflicts and challenges, but should not be overlooked in any new endeavors aimed at developing a code of conduct for international arbitration.