Recommended practice is to designate one person at your organization as your representative and have that person’s signature on your appeal letters. You might select your physician advisor or your UM manager. Select someone who is involved and knowledgeable about your appeal methodologies. It’s common to have appeal letters signed by a representative who didn’t author the actual appeal but has oversight of the appeals process at your organization. That single person acts as the representative on the AOR as well as the signatory on the appeal letters.