Indiana Code Title 2. General Assembly § 2-3-4-2

Sec. 2. (a) Except as provided in subsection (c), a legislative notary is not authorized to perform any of the acts described in section 1 of this chapter until the individual procures a seal that will stamp upon paper a distinct impression, in words or letters, sufficiently indicating the individual's official character as a legislative notary.  The individual may add to the seal any other device the individual chooses.

(b) Except as provided in subsection (c), an act not attested by a seal described in subsection (a) is void.

(c) If a legislative notary is performing an act described in section 1(a)(2) of this chapter, the act does not need to be attested by a seal.