Acquiescence Waives ICWA Diligent-Efforts Challenges in Montana YINC Termination Appeals

1. Introduction

This consolidated appeal arose from three Youths in Need of Care (YINC) proceedings in Cascade County involving L.C., X.P., and N.C. The District Court terminated C.C.’s (Mother’s) parental rights under § 41-3-609(1)(f), MCA (YINC adjudications, unsuccessful completion of treatment plan, and unfitness unlikely to change). Mother did not challenge those termination grounds on appeal.

Instead, Mother argued that the District Court committed reversible error by concluding the Department of Public Health and Human Services, Child and Family Services Division (the Department), made “diligent efforts” to determine whether the Indian Child Welfare Act (ICWA) applied—i.e., whether any child was an “Indian child” under 25 U.S.C. § 1903(4).

The core issues were (1) whether the Department’s inquiries and notices to the Blackfeet Tribe sufficed as diligent efforts, and (2) whether Mother’s failure to object during the proceedings barred her from raising alleged ICWA-inquiry deficiencies for the first time on appeal.

2. Summary of the Opinion

The Montana Supreme Court affirmed. It held that the District Court’s finding of diligent efforts was not clearly erroneous as to any child. For X.P., the Department’s prior history gave “reason to know,” prompting tribal verification efforts and notice; the Blackfeet Tribe responded that X.P. was not enrolled or eligible, and the Tribe never revised that determination after receiving additional identifying information. For L.C. and N.C., the record contained no “reason to know,” and a later-discovered spelling error concerning their putative father did not require renewed tribal verification—especially where paternity was never established and ICWA’s definition hinges on a biological parent’s tribal membership.

Separately, the Court held that even if diligence were “arguably” lacking, Mother waived the issue by acquiescing below—agreeing at hearing that the ICWA qualified expert witness (QEW) need not testify, failing to object to repeated “ICWA does not apply” findings, and failing to present any new information despite the court’s standing directive to do so.

3. Analysis

3.1 Precedents Cited

• In re A.S., 2016 MT 156 — Provided the overarching standard of review for termination of parental rights (abuse of discretion).
• In re L.D., 2018 MT 60 — Elaborated on what constitutes abuse of discretion in this context (termination based on clearly erroneous findings, erroneous legal conclusions, or arbitrary action). Also referenced in the ICWA “reason to know” discussion via In re L.H., 2021 MT 199.
• In re M.V.R., 2016 MT 309 — Confirmed appellate review standards: factual findings for clear error and legal conclusions for correctness.
• In re L.H., 2021 MT 199 — Supplied the framework for ICWA applicability in Montana Title 41 proceedings: the “reason to know” threshold, the Department’s duty to investigate and notify, and the principle that tribal eligibility is a factual matter dependent on the case record.
• In re S.R., 2019 MT 47 — Reinforced that what constitutes a “reasonable basis” to believe a child may be eligible for tribal enrollment varies with the record. The Court used this to validate a fact-specific diligence inquiry rather than a rigid checklist.
• In re Jeremiah G., 172 Cal. App. 4th 1514, 92 Cal. Rptr. 3d 203 (Cal. Ct. App. 2009) and In the Interest of Z.H., 740 N.W.2d 648 (Iowa Ct. App. 2007) — Cited (through In re L.H.) for the proposition that a “reason to know” generally requires more than a vague assertion of possible Indian ancestry without an identified ancestor and reasonably suspected tribal connection.
• In re A.A., 2005 MT 119 — Anchored the waiver/acquiescence doctrine: a party cannot complain on appeal about an action in which it acquiesced or actively participated (“We will not put a district court in error…”).
• In re A.J.C., 2026 MT 80 — Cited alongside In re A.A. to confirm the continued vitality of waiver by acquiescence in Montana child welfare proceedings.

3.2 Legal Reasoning

(a) ICWA’s trigger and the “reason to know” inquiry.
The Court grounded ICWA applicability in the statutory definition of “Indian child”: a minor who is either (1) a member of an Indian tribe, or (2) eligible for membership and the biological child of a member (25 U.S.C. § 1903(4)). ICWA’s procedural requirements (including notice) engage when the court has “reason to know” an Indian child is involved (25 U.S.C. § 1912(a)), a standard the Court described (via In re L.H. and In re S.R.) as more than a vague possibility but less than certainty.

(b) Diligent efforts as to X.P.: notice + tribal response + no revision.
For X.P., the Department had prior-history information suggesting possible Blackfeet affiliation. It sent a verification request and also mailed, by certified mail, a Notice of Hearing and petition containing identifying information, including both parents’ names and addresses. The Blackfeet Tribe sent a letter stating X.P. was not enrolled or eligible. Although the response arrived the same day the notice was mailed—raising Mother’s theory that the Tribe might not have searched using the father’s identity—the Court emphasized that the Tribe later received the additional information yet never amended its determination.

Critically, the Court treated the Tribe’s eligibility determination as conclusive: “Whether a child is eligible for tribal membership…is a question of fact for exclusive determination by the Indian tribe(s),” citing In re S.R. and 25 C.F.R. § 23.108(b). On that record, the District Court did not clearly err in finding diligent efforts.

(c) Diligent efforts as to L.C. and N.C.: no “reason to know,” typo, and non-establishment of biological paternity.
For L.C. and N.C., the Court found the record devoid of any “reason to know”: Mother reported the putative father (D.A.) was deceased and provided no information that he was a tribal member or affiliated with a tribe. The Department nevertheless sought verification from the Blackfeet Tribe.

Mother’s appellate challenge focused on a later-disclosed spelling error in D.A.’s surname and the Department’s failure to re-contact the Tribe after correcting it. The Court rejected this as a diligence requirement for two independent reasons:

• No predicate “reason to know” existed that would obligate additional investigation or renewed verification.
• ICWA ties eligibility to biological parentage; D.A. remained a “putative” father and no paternity testing established him as the biological father. Without a biological link, the statutory definition in 25 U.S.C. § 1903(4) could not be satisfied via his tribal status.

(d) Waiver by acquiescence: ICWA cannot be invoked as a belated procedural tactic.
The Court added an alternative holding with broader precedential force: even assuming arguable deficiencies, Mother waived the issue by acquiescing. The District Court repeatedly found diligent efforts and directed parties to promptly disclose any new Indian-status information. Mother: (1) did not object across multiple orders, (2) agreed QEW testimony was unnecessary once tribal letters were received, and (3) never provided new information when invited to do so.

Applying In re A.A. (and reaffirmed by In re A.J.C.), the Court refused to “put a district court in error” for actions Mother accepted. It underscored ICWA’s protective purpose—stability for Indian children and tribes—and warned against using ICWA “as a procedural technicality to delay and contest termination” when the parent does not genuinely claim the children are Indian children.

3.3 Impact

• Stronger preservation requirement for ICWA-inquiry complaints in Montana. This decision signals that parents (and counsel) must timely object to perceived ICWA-investigation defects in the district court; silence across repeated ICWA findings can operate as waiver by acquiescence.
• Practical finality of tribal “not eligible/not enrolled” letters. By emphasizing exclusivity and conclusiveness of tribal determinations (via 25 C.F.R. § 23.108(b)), the Court reduces incentives for speculative appellate attacks on the adequacy of tribal searches absent new, concrete information.
• Clarification of paternity’s relevance to ICWA eligibility. Where a father is merely “putative” and biological paternity is not established, the Court’s reasoning narrows arguments that a child is an “Indian child” based on that person’s potential tribal affiliation.
• Litigation conduct matters. Agreements on the record (e.g., QEW testimony not needed, “if something changes we’ll bring it back”) may later foreclose appellate challenges framed as ICWA compliance issues.

4. Complex Concepts Simplified

• Youth in Need of Care (YINC): A Montana court finding that a child requires state intervention due to abuse, neglect, or similar conditions.
• ICWA: A federal law imposing heightened protections (notice, placement preferences, evidentiary burdens, and “active efforts” standards) when state proceedings involve an “Indian child.”
• “Indian child” (25 U.S.C. § 1903(4)): A child under 18 who is a tribal member, or is eligible for membership and the biological child of a tribal member.
• “Reason to know”: A threshold level of information that gives the court/agency a reasonable basis to believe ICWA may apply, triggering duties to investigate and notify the tribe.
• Diligent efforts (ICWA applicability inquiry): Reasonable investigative steps to determine whether the child is an “Indian child,” which commonly includes gathering family information and seeking a tribal determination.
• Putative father vs. biological father: A putative father is an alleged/supposed father; ICWA’s eligibility pathway depends on a biological parent’s tribal membership.
• Qualified Expert Witness (QEW): An ICWA-specific expert often required to support certain findings when ICWA applies; here, the parties agreed QEW testimony was unnecessary once the Tribe indicated no eligibility.
• Waiver by acquiescence: If a party agrees to, participates in, or fails to object to an alleged error in the trial court, the party may be barred from raising it on appeal.

5. Conclusion

Matters of L.C., X.P. & N.C., YINC affirms termination while sharpening two practical rules for Montana child welfare litigation: (1) a tribe’s “not enrolled/not eligible” determination—unrevised after receipt of identifying information—can conclusively support a finding that ICWA does not apply; and (2) a parent who repeatedly fails to object, and affirmatively agrees with ICWA non-applicability proceedings, may waive later appellate challenges to the Department’s ICWA diligence. The decision reinforces ICWA’s protective purpose while discouraging after-the-fact, technical challenges untethered to genuine claims of Indian-child status.