No, a copy of the other patients Doctor Recommendation should be enough. I have been instructed that it is legally safer to call yourselves a co-op instead of a caregiver. The reason is that to be a "caregiver" has a different definition depending upon where you are located (county by county). Also there are specifics and if you overlook one of them, or it can be proven that you did not perform a certain task, this can be used against you in the court of law.

This is how it was explained to me...far from solid facts, but sounded believable and intelligent