Ind. Code § 29-1-7-13
(c) If the will is self-proved, compliance with signature requirements for execution and other requirements of execution are presumed subject to rebuttal without the testimony of any witness upon filing the will and the acknowledgment and verifications annexed or attached to the will, unless there is proof of fraud or forgery affecting the acknowledgment or verification.
Formerly: Acts 1953, c.112, s.713; Acts 1975, P.L.288, SEC.7.