Date: May 15, 2026

Unfounded CPS Reports Support Tailored Custody Relief, Not Sole Legal Custody, Absent a Broad Coparenting Breakdown

1. Introduction

Matter of Siara Q. v Thomas R. (2026 NY Slip Op 03043 [249 AD3d 1383] [3d Dept May 14, 2026]) addresses when a Family Court may modify a joint legal custody order after one parent makes multiple unfounded reports to Child Protective Services (CPS) and the parties clash over medical decision-making.

The parties are parents of a child born in 2022. A June 2024 custody order awarded joint legal custody, primary physical custody to the mother, and parenting time to the father, while also giving the mother final decision-making authority over a particular elective surgery. After that order, the mother filed modification petitions alleging that the father (i) made numerous unfounded CPS reports and (ii) was unwilling to coparent. Family Court credited the mother’s testimony and modified the order by granting the mother sole legal custody and final decision-making authority in all medical issues. The father appealed.

The central issues on appeal were: (1) whether the record supported a change in circumstances; (2) whether the child’s best interests justified moving from joint to sole legal custody; and (3) whether the court could instead address discrete disputes through narrower, tailored relief (notably, medical decision-making authority).

2. Summary of the Opinion

The Appellate Division, Third Department modified the Family Court order. It held that the father’s unfounded CPS reports and related conduct supported a finding of a change in circumstances and justified granting the mother final decision-making authority as to medical care. However, the court found no sound and substantial basis for awarding the mother sole legal custody because the evidence showed disagreements on specific issues, not a general, unworkable breakdown in coparenting.

Result: The award of sole legal custody to the mother was reversed; the remainder (including medical decision-making authority) was affirmed.

3. Analysis

A. Precedents Cited

The decision is built on a well-established modification framework and a set of joint custody principles, applied with particular attention to the difference between (i) disruptive conduct that warrants intervention and (ii) conduct so corrosive that joint legal custody becomes unworkable.

Matter of Patricia P. v Dana Q., 106 AD3d 1386 (3d Dept 2013) and Matter of Christine X. V James Y., 244 AD3d 1545 (3d Dept 2025)
Use in this opinion: These cases are cited for the “threshold” rule: a court must first find a significant change in circumstances since the prior order sufficient to warrant revisiting custody in order to protect the child’s best interests. The Third Department frames its analysis exactly in this two-step sequence.
Matter of Kelly AA. v Christopher AA., 240 AD3d 1011 (3d Dept 2025), lv denied 44 NY3d 910 (2026) and Matter of Michael DD. v Jamie EE., 243 AD3d 1149 (3d Dept 2025)
Use in this opinion: These authorities supply the standard formulation that the movant must prove both: (1) change in circumstances, and then (2) that modification serves the child’s best interests.
Matter of Barrett LL. v Melissa MM., 224 AD3d 942 (3d Dept 2024), lv denied 42 NY3d 905 (2024) and Matter of Jessica HH. v Sean HH., 196 AD3d 750 (3d Dept 2021)
Use in this opinion: These cases anchor the appellate posture: substantial deference to Family Court’s factfinding and credibility determinations, and affirmance so long as there is a “sound and substantial basis” in the record. Importantly, the Third Department uses this deference to uphold the change-in-circumstances finding, but not to sustain the broader leap to sole legal custody.
Matter of Patrick EE. v Brenda DD., 129 AD3d 1235 (3d Dept 2015), lv denied 26 NY3d 908 (2015)
Use in this opinion: Cited to support the proposition that post-order conduct involving CPS reports can constitute a change in circumstances. The Third Department aligns the father’s post-order unfounded reports with this recognized category of changed conditions.
Matter of Jessica AA. v Thomas BB., 151 AD3d 1231 (3d Dept 2017) and Matter of Crystal F. v Ian G., 145 AD3d 1379 (3d Dept 2016)
Use in this opinion: These cases are invoked in a “cf.” posture to frame an inference: unfounded CPS reports may be viewed as an attempt to interfere with the other parent’s custodial rights. The court uses these citations to validate the concern while still insisting on a best-interests analysis grounded in the overall functionality of joint legal custody.
Matter of Esther J. v Christopher K., 248 AD3d 1450 (3d Dept 2026)
Use in this opinion: This is the opinion’s key comparator for calibrated remedies. It supports two propositions: (1) a communication breakdown affecting medical needs can warrant targeted relief, and (2) granting one parent final medical authority can be an appropriate fix without necessarily ending joint legal custody.
Matter of Carrie ZZ. v Aaron YY., 178 AD3d 1291 (3d Dept 2019) and Matter of Michelle EE. v John EE., 235 AD3d 1121 (3d Dept 2025)
Use in this opinion: These cases provide the best-interests factor list (relative fitness, willingness to foster the other parent’s relationship, compliance with orders, stability, and overall well-being), which the court applies to separate (i) medical decision-making from (ii) global legal custody.
Matter of Joseph L. v Heather K., 214 AD3d 1041 (3d Dept 2023)
Use in this opinion: Supplies a crucial joint custody rule: “some disagreements” do not necessarily defeat joint custody unless acrimony renders it “unworkable.” The Third Department treats this as the governing test for whether to move from joint to sole legal custody.
Matter of Williams v Rolf, 144 AD3d 1409 (3d Dept 2016); Matter of Greene v Robarge, 104 AD3d 1073 (3d Dept 2013); and again Matter of Patrick EE. v Brenda DD., 129 AD3d 1235 (3d Dept 2015)
Use in this opinion: These cases are used as “compare” authorities to draw a line: CPS-related conduct and its disruption can, in some settings, justify more severe custody consequences; here, the record lacked “more” that would call the father’s parental fitness broadly into doubt.
Matter of C.M. v Z.N., 230 AD3d 1409 (3d Dept 2024)
Use in this opinion: Articulates the “unable to effectively and directly communicate” standard, which the Third Department uses as the litmus test for whether joint legal custody has become unworkable. The court held the evidence did not meet that threshold because the parents could communicate productively on most topics using tools like a notebook and the Talking Parents app.
Matter of Carlo A. v Pamela B., 242 AD3d 1331 (3d Dept 2025), lv denied 45 NY3d 902 (Apr. 16, 2026) and Matter of Janaye D. v Zachary C., 240 AD3d 961 (3d Dept 2025), lv denied 44 NY3d 910 (2026)
Use in this opinion: Cited for the proposition that when parents reach impasse on discrete issues, courts may implement tailored modifications rather than terminating joint legal custody wholesale.
Matter of Christie BB. v Isaiah CC., 194 AD3d 1130 (3d Dept 2021) and Matter of Sheena PP. v Edward QQ., 238 AD3d 1417 (3d Dept 2025)
Use in this opinion: These cases reinforce appellate policing of the “sound and substantial basis” requirement. The Third Department relies on them to conclude that, on this record, sole legal custody lacked adequate evidentiary support.
Matter of Winter II. [Kerriann II.], 227 AD3d 1142 (3d Dept 2024), lv denied 42 NY3d 903 (2024) and Matter of Corey MM. [Cassandra LL.], 177 AD3d 1119 (3d Dept 2019)
Use in this opinion: These authorities inform the procedural footnote: even though Family Court described proceeding by “inquest,” the father was not truly in default where counsel appeared and participated; therefore the appeal was properly before the Third Department. The court distinguishes situations where a default posture may affect appellate review.

B. Legal Reasoning

Step One: Change in circumstances.
The Third Department accepted that the father’s post-order CPS reporting—found unfounded—began after the June 2024 order and constituted a sufficiently significant change. The court also emphasized the father’s failure to notify the mother about an emergency room visit (contrary to the June 2024 order), treating it as evidence of a communications breakdown specifically impacting the child’s medical needs.

Notably, the court observed (fn 2) that the mother’s testimony was the only evidence about the CPS reports; yet even with this limited evidentiary record, the change-in-circumstances threshold was met.
Step Two: Best interests—separating “medical authority” from “legal custody status.”
The court then performed a best-interests analysis and bifurcated the remedy. It affirmed expanded medical final decision-making authority because the record supported that the father advocated reducing Tylenol dosing against physician recommendations and accused the mother of overdosing—creating risk of delay or conflict in time-sensitive medical care.

But the court rejected the broader jump to sole legal custody. It applied the principle that joint custody can survive “some disagreements” unless the relationship is so acrimonious that joint legal custody is “unworkable” (Matter of Joseph L. v Heather K.). Here, the mother’s own testimony showed that the parties could communicate productively on most matters and agreed on key domains like religion and education, using structured communication tools. The disputes (passport consent, Spanish-language learning, and medical disputes) were real but not proof of global inability to coparent.

The Third Department’s core move is doctrinally significant: it treats unfounded CPS reports as serious and potentially interfering conduct, but it requires additional evidence of broader parental unfitness or pervasive coparenting collapse before endorsing sole legal custody. In other words, disruptive conduct may warrant targeted adjustments, not necessarily a wholesale transfer of legal custody.
Appellate “sound and substantial basis” control.
Even with deference to credibility findings, the Third Department insisted that the ultimate custodial remedy must be supported by the record. It found the evidentiary showing insufficient to demonstrate that sole legal custody served best interests, and therefore modified the order.
Procedural clarity: “inquest” language does not equal default when counsel participates.
In fn 1, the court corrected a common procedural pitfall in custody modifications: Family Court described proceeding by “inquest” because the father did not personally appear, but did not expressly find default, the order was not denominated as a default order, and the father’s counsel “diligently participated.” The Third Department relied on Matter of Winter II. [Kerriann II.] to confirm appellate review remained available, distinguishing cases like Matter of Corey MM. [Cassandra LL.].

C. Impact

Encourages calibrated custody modifications.
The opinion reinforces that courts should prefer targeted solutions—such as allocating final decision-making on a discrete domain—when the conflict is issue-specific. This can reduce incentives for litigants to seek (or courts to grant) overbroad custody changes as a blunt response to narrow impasses.
Clarifies the evidentiary gap between “change in circumstances” and “sole legal custody.”
Practically, the decision signals that meeting the change-in-circumstances threshold (even through troublesome CPS activity) does not automatically justify converting joint legal custody to sole legal custody; the movant must still prove that joint decision-making is unworkable or contrary to best interests.
Medical decision-making disputes may justify expanded authority quickly.
The court’s willingness to uphold final medical authority reflects judicial sensitivity to delay and conflict where medical care is at stake, especially when one parent’s conduct appears to contradict medical recommendations or threatens treatment continuity.
Procedure: counsel participation protects appellate review.
By rejecting an implicit “default” framing where counsel actively litigates, the decision may curb casual use of “inquest” terminology and protect due-process expectations in custody modifications.

4. Complex Concepts Simplified

Legal custody vs. physical custody: Legal custody is decision-making authority over major aspects of a child’s life (health care, education, religion, etc.). Physical custody concerns where the child primarily lives day-to-day.
Joint legal custody: Both parents share decision-making. It requires a workable ability to communicate and cooperate on major issues, though it does not require perfect harmony.
Sole legal custody: One parent has final authority over major decisions. Courts generally require a stronger showing—such as severe conflict, inability to communicate, or other best-interests concerns— before replacing joint legal custody.
Final decision-making authority: A hybrid tool: parents may still discuss and attempt agreement, but if they cannot agree, one parent has the power to make the final call on a specific topic (here, medical issues). This is a “tailored relief” mechanism short of sole legal custody.
Change in circumstances: A required threshold in modification cases: the court will not re-litigate custody unless something meaningful has changed since the last order.
Best interests of the child: The ultimate standard guiding custody determinations, assessed through multiple factors (parental fitness, stability, fostering the other parent’s relationship, compliance with orders, and the child’s well-being).
Sound and substantial basis: The appellate standard: Family Court’s custody decision must be supported by sufficient record evidence. Deference to credibility findings is strong, but not unlimited—particularly where the remedy chosen is broader than the proven problem.
AFC (Attorney for the Child): A lawyer appointed to represent the child’s interests in Family Court proceedings. Here, the Third Department noted differences between the AFC’s positions below and on appeal, and highlighted that the AFC below favored targeted relief rather than sole legal custody.

5. Conclusion

Matter of Siara Q. v Thomas R. crystallizes a practical rule for custody modification litigation: unfounded CPS reports and medical communication failures may constitute a change in circumstances and justify granting one parent final medical decision-making authority, but they do not, without more, provide a sound and substantial basis for converting joint legal custody to sole legal custody.

The decision’s broader significance lies in its insistence on proportional remedies—tailoring relief to the specific dysfunction proven—while preserving joint legal custody where parents can still communicate effectively on most core aspects of the child’s life.