We have a situation where an entity is requesting documents/appealing a denial of a claim. The entity attached a form whereby the participant designed and assigned his/her rights to the hospital. However, the hospital was not the entity making the request, so we told the entity sorry, you aren't the authorized rep, the hospital is, then the entity sent us the fee arrangement between it and the hospital for collections, etc. I'm still inclined to say sorry - this is not sufficient to demonstrate the participant named your entity as the authorized rep... in fact, participant named hospital, not you. Thoughts??