Which of the following is NOT a valid form of DNR?

A valid Do Not Resuscitate (DNR) order is a legal directive for healthcare providers indicating that a patient does not wish to receive cardiopulmonary resuscitation (CPR) in the event that their heart stops or they stop breathing. The term "valid" here refers to the recognition and acceptance of the DNR by emergency medical personnel and healthcare providers as a legitimate expression of the patient's wishes.

The notation of "No Code" or "No CPR" in a patient's chart is a clear expression of the patient's wishes regarding resuscitation efforts and is typically recognized in medical practice and emergencies. The CDNR Medallion serves as a physical representation of a DNR status, providing quick identification to emergency responders about the patient's wishes. A Durable Power of Attorney for Health Care allows a designated individual to make healthcare decisions on behalf of the patient, which may include decisions regarding resuscitation, if specified.

The Emergency Medical Services Authority report, while it may contain relevant information about patient care or interventions, is not a legally recognized documentation or directive regarding DNR status. Unlike the other options, it does not serve as an explicit statement of the patient's wishes regarding resuscitation, meaning it cannot be considered a valid DNR form.