This is a person of legal age, designated by the patient in advance (family member, friend, neighbor, attending physician, etc.) to receive medical information and report the patient's wishes if he or she is unable to express his or her wishes. It is important for this person to have in-depth discussions with the patient, in order to best convey his or her wishes, since he or she will be speaking on behalf of the patient and not in a personal capacity. This designation is forensic and must be made in writing, on plain paper or on the form provided by the ICU. The document must specify the contact details of the trusted support person, and include the signature of both the patient and the designated trusted support person. The trusted support person may have a copy of the advance directives in his or her possession, so that he or she can refer to them at the appropriate time. The designation of a trusted support person may be reviewed and revoked at any time.