The administrator of veterans’ affairs or his successor, is and shall be a party in interest in any proceedings brought under any law of this state for the appointment of a conservator or curator of a veteran of any war or other beneficiary on whose account benefits of compensation, adjusted compensation, pension or insurance or other benefits are payable by the veterans’ administration, and the said administrator or his successor is and shall be an interested party in the administration of the estate of any such pensioner on whose account such benefits are payable or whose estate includes assets derived from benefits paid by the veterans’ administration, its predecessor or successor, and written notice shall be given by registered mail (unless waived in writing) to the office of the veterans’ administration having jurisdiction over the area in which the court is located, of the time and place for hearing on any petition or pleading or in connection with any proceeding pertaining to or affecting in any manner the administration of the estate of any beneficiary of the veterans’ administration. Said notice shall be given at such time as to reach such office in due course of mail not less than ten (10) days before the date of such hearing or other proceeding.