You can appoint more than one person. Your decision to appoint multiple substitute decision makers who must act together should not be made lightly. While the two or more individuals are to act on your previous instructions, there is always room for interpretation, and you cannot specifically set out your wishes for every possible physical or mental issue you may face. Your instructions must be general at times, and the generality of these instructions leaves room for differing interpretations, which could lead to indecision when decisions are needed. If you do want to appoint more than one person, consider appointing three rather than two people, with a majority rule situation so that there can be no stalemates. We normally recommend one person, but also appointing one or more backups in case the initial appointee is not available or unwilling to then act in such a role.