Upon receipt of an application requesting informal probate of a will, the registrar, upon making the findings required by section 14-3303 shall issue a written statement of informal probate if at least one hundred twenty hours have elapsed since the decedent's death. Informal probate is conclusive as to all persons until superseded by an order in a formal testacy proceeding. No defect in the application or procedure relating thereto which leads to informal probate of a will renders the probate void.