The court may authorize or direct the parent, person, or institution maintaining the minor to execute as natural guardian, any receipt, deed, mortgage, or other appropriate instrument necessary to carry out a decree entered under section 5101 (relating to when guardian unnecessary) and, in such event, may require the deposit of money in a savings account or the care of securities in any manner considered by the court to be for the best interests of the minor. The decree so made, except as the court shall expressly provide otherwise, shall constitute sufficient authority to all transfer agents, registrars and others dealing with property of the minor to recognize the persons named therein as entitled to receive the property, and shall in all respects have the same force and effect as an instrument executed by a duly appointed guardian under court decree.