Ind. Code § 31-19-9-15

(1) fails to file a paternity action: (A) under IC 31-14; or (B) in a court located in another state that is competent to obtain jurisdiction over the paternity action; not more than thirty (30) days after receiving actual notice under IC 31-19-3 of the mother's intent to proceed with an adoptive placement of the child, regardless of whether the child is born before or after the expiration of the thirty (30) day period; or

(2) files a paternity action: (A) under IC 31-14; or (B) in a court located in another state that is competent to obtain jurisdiction over the paternity action; during the thirty (30) day period prescribed by subdivision (1) and fails to establish paternity in the paternity proceeding under IC 31-14 or the laws applicable to a court of another state when the court obtains jurisdiction over the paternity action. (b) This section does not prohibit a putative father who meets the requirements of section 17(b) of this chapter from establishing paternity of the child.