Section 148A(2) in The Code of Civil Procedure, 1908
(2)Where a caveat has been lodged under sub-section (1), the person by whom the caveat has been lodged (hereinafter referred to as the caveator) shall serve a notice of the caveat by registered post, acknowledgment due, on the person by whom the application has been, or is expected to be, made under sub-section (1).