If there is no person entitled to petition for the appointment of a guardian or if the person so entitled shall neglect or refuse to file such a petition within 30 days after mailing of notice by the Department of Veterans Affairs by registered mail to the last known address of such person indicating the necessity for the same, a petition for such appointment may be filed in the probate court by or on behalf of any inhabitant of this state. The petition for appointment shall set forth the name, age, place of residence of the ward, the names and places of residence of the nearest relatives, if known, and the fact that such ward is entitled to receive moneys payable by or through the Department of Veterans Affairs and shall set forth the amount of moneys then due and the amount of probable future payments. The petition shall also set forth the name and address of the person or institution, if any, having actual custody of the ward. In the case of a mentally incompetent ward, the petition shall show that such ward has been rated incompetent on examination by the Department of Veterans Affairs in accordance with the laws and regulations governing the Department of Veterans Affairs.