Ind. Code § 31-19-16.5-5
The court may vacate or modify a postadoption contact order entered under this chapter at any time after the adoption if the court determines, after a hearing, that it is in the best interests of the adopted child. Before hearing the petition to:
the postadoption contact order, the court may appoint a guardian ad litem or court appointed special advocate to represent and protect the best interests of the adopted child. However, the court may only appoint a guardian ad litem or court appointed special advocate for the adopted child under this chapter if the interests of an adoptive parent differ from the child's interests to the extent that the court determines that the appointment is necessary to protect the best interests of the child.
IC 31-19-16.5-5