Missouri

Statutory framework; factor structure: 8.

Authority

Mo. Rev. Stat. § 452.375.2

Source framework

Statutory

Factor structure

8

Operative language

shall

Catch-all language

preamble

Presumptions in the original survey

Equal or approximately equal parenting time, rebuttable

Child's voice / age rule

none

Compare best interests nationally

Irretrievable breakdown. If denied under oath, § 452.320 requires one of five specified facts: intolerable adultery, unreasonable-to-live-with behavior, six-month abandonment, 12 months apart by mutual consent, or 24 months apart.

Authority

Mo. Rev. Stat. §§ 452.305, 452.320

Grounds without a misconduct showing

Irretrievable breakdown. If denied under oath, § 452.320 requires one of five specified facts: intolerable adultery, unreasonable-to-live-with behavior, six-month abandonment, 12 months apart by mutual consent, or 24 months apart.

Other grounds and proof conditions

The five proof alternatives are part of the breakdown inquiry. They are not five independently pleaded statutory grounds.

Separation

No fixed separation where breakdown is undisputed. If disputed and misconduct is not established, the 12- or 24-month alternatives matter. In re Marriage of Uhls, 549 S.W.2d 107, 111–12 (Mo. Ct. App. 1977), permits proof of separate lives within one abode.

Timing

Thirty days must have elapsed since filing under § 452.305.1(1). Effective August 28, 2026, § 452.305.3 states: “Pregnancy status shall not prevent the court from entering a judgment of dissolution of marriage or legal separation.” Section 452.310.2(5) retains the petition's pregnancy disclosure and adds the same restriction. If breakdown is denied under oath, § 452.320.2(2) separately permits continuation for a further hearing thirty days to six months later, or later as the court calendar permits; the statutory breakdown finding is still required at the adjourned hearing.

Relief without dissolution

Yes, judgment of legal separation, § 452.305.2

Compare divorce grounds nationally

For child relocation, the mover proves good faith and best interests; ordinarily notice is sixty days and a parent’s motion window is thirty days after receipt. Whether a temporary parent-only move requires notice remains unresolved; the cases read construe child moves and the temporary-absence exclusion. Abraham (S.D. 2011) requires strict compliance with the notice requirement and declares conflict with the 'absolute right' reading in Baxley.

Authority

Mo. Rev. Stat. 452.377

Court test

hybrid (relocation statute, no factor list)

Burden classification

burden on the relocating parent

Notice classification

yes

Trigger classification

child residence for ninety days or more; parent-only notice interaction unresolved

Effect of silence

Yes, for child relocation under § 452.377.8 after required notice and absent a timely parent motion

What the court weighs

The relocating party must prove good faith and the child's best interest (§ 452.377.10). Pasternak, quoting Swisher, describes good faith by the relocating parent's motive or purpose being something other than disrupting or depriving the other parent of contact. Pasternak permits consideration of the § 452.375.2 custody factors because they are equally relevant to relocation; O'Brien applies that rule. Allen, quoting Mantonya, states that § 452.377.10 does not expressly require statutory best-interest findings; that findings statement is distinct from the permitted use of custody factors. Allen also applies Stowe's rejection of the pre-1998 Michel four-part test. If relocation is allowed, § 452.377.11 requires sufficient frequent, continuing and meaningful contact unless the child's best interest warrants otherwise, allocation of transportation costs, and a child-support adjustment as appropriate considering transportation costs.

Who carries the burden

On the relocating party throughout (good faith and best interest), § 452.377.10. No shift. A parent who objects in good faith cannot be ordered to pay the mover's costs and fees (§ 452.377.15).

Notice and safety exceptions

Yes. Written notice by certified mail, return receipt requested, to any party with custody or visitation rights, at least 60 days before the proposed relocation, absent exigent circumstances found by a court. Contents: new address (or city if unknown), phone if known, move date, specific reasons for the proposed child relocation if applicable, a proposed revised custody/visitation schedule if applicable, and notice of the other parent's right to move to prevent relocation within 30 days. Continuing duty to update. The court may limit disclosure for safety. Address-confidentiality participants may withhold the address subject to in camera review (§ 452.377.2-5,.13). After August 28, 1998, every court order establishing or modifying custody or visitation must include the statutory notice warning (§ 452.377.12). Subsection 2 separately refers to relocation of a party’s residence. No authority identified resolves its interaction with subsection 1’s child-residence duration and temporary-absence definition for a temporary parent-only move.

Which moves trigger the rule

Section 452.377.1 defines 'relocate' or 'relocation' as a change in the child's principal residence for ninety days or more, excluding a temporary absence. Subsection 2 separately requires notice of a proposed relocation of the residence of the child or any party entitled to custody or visitation. There is no mileage or state-line threshold in this text. No authority identified resolves how subsection 1's child-residence definition and duration interact with subsection 2's parent-only notice language. Dent (E.D. 2008) held that overnight stays by a parent and the children at a fiancé's home, with the principal residence maintained, were a 'temporary absence' requiring no notice; Baxley (W.D. 2002) read the statute's permission as directed at 'the parent's relocation with the child'; Gaudreau (E.D. 2014) read the section as presupposing a designated principal residence of the child. None decides a temporary parent-only move, and no duration rule for one is stated here.

Objections and the effect of silence

A parent may file a motion seeking an order to prevent relocation within thirty days after receiving notice, accompanied by an affidavit stating the specific good-faith factual basis supporting a prohibition. The person seeking relocation must respond within fourteen days, unless extended by the court for good cause, with a counter-affidavit supporting relocation and a proposed revised parenting plan. Under § 452.377.8, the child's residence may be relocated sixty days after providing notice as required by the section unless a parent files the motion within thirty days after receipt. If relocation of the child is proposed, a third party entitled by court order to legal custody or visitation, who is not a parent, may seek a revised schedule but shall not prevent relocation (§ 452.377.9).

The modification threshold

Not required for the relocation ruling itself, which is decided under § 452.377. Failure to give notice is a factor in modifying custody, a basis for ordering the child's return, and grounds for fee-shifting (§ 452.377.6). A violation of the section or a relocation order 'may be deemed a change of circumstance under section 452.410' (§ 452.377.14). Separately, § 452.411 deems either parent's change of residence to another state a change of circumstances under § 452.410; Couzens v. Post (W.D. Mar. 10, 2026) applied it as satisfying the change-of-circumstances step without mandating modification, while Baxley (W.D. 2002) held that a relocation permitted under § 452.377 cannot itself be the substantial change.

Other qualifications

Section 452.377.8 permits relocation of the child’s residence 60 days after required notice unless a parent moves to prevent relocation within 30 days after receipt, with an affidavit stating the specific good-faith factual basis. A good-faith objector is shielded from paying the mover's fees (§ 452.377.15).

Burden summary

On the moving parent

Notice summary

60 days; exceptions apply

Trigger summary

No distance threshold

Compare parental relocation nationally