Regulation 4
A payment in respect of a savings bank annuity shall not be made by the Commissioners except upon proof of the existence of the nominee, or, if the annuity depends on two joint lives and the life of the survivor, of either of the nominees, or, if the annuity depends on the joint continuance of two lives, of both the nominees, either—
(a)
by the personal appearance of such nominee or nominees at the National Debt Office on the day for payment or some day subsequent thereto; or
(b)
by the production of such certificate of existence and declaration as to identity as the Commissioners may from time to time require.