Affidavits which are required to be made by a party to an action, including affidavits to the pleadings, shall not be made by an incapacitated party, but may be made on the party's behalf by the party's guardian or any competent person, if the guardian or other competent person has knowledge or information as to the facts averred therein, and shall state the nature of the party's incapacity.
231 Pa. Code r. 2061