Section 14(2) in The Post Office Savings Certificates Rules, 1960
(2)The identity slip shall be surrendered at the time of the final discharge of the certificate or in case of its loss shall be furnished to the Post Office in the form laid down by the Director General Post.Note 1. - A thumb impression or mark shall not be accepted in lieu of signature under this sub rule.Note 2. - In the case of Joint B type certificates, if one of the joint holders is literate, and the other illiterate, an identity slip may be issued bearing the signature of the literate holder only provided that a written request is made jointly by both the holders in this behalf and the illiterate holder is identified to the satisfaction of the postal authorities.
