Section 194(2)(ii) in The Navy (Pension) Regulations, 1964
(ii)subject to the provisions of sub-regulations (3) and (4) a certificate signed by a Gazetted Officer of the Central Government or any State Government or by some other respectable person that the pensioner is alive. The certificate must bear the signature or the left thumb impression of the pensioner taken in the presence of that officer or person; [and shall be produced once in six month.]