Section 54

The court may, on the application of any person interested, if it appears that there is reason to believe that any will or other testamentary document of a deceased person is in the possession or under the control of any person, or that any person has knowledge of the existence of such a will or document, order that that person do, within a time named, produce the will or document at the registry, or attend at a time named before a court, for the purpose of being examined in relation to the will or document.