Family Law Modifications in Columbia

Legal Standards for Missouri Family Law Modifications

The required proof depends on the part of the order a person wants to change. Adjusting a visitation schedule isn’t evaluated under the same standard as changing primary physical custody, even when both requests arise from the same circumstances.

Primary Physical Custody
Missouri law requires a custody modification to serve the child’s best interests following a change in the circumstances of the child or custodian. Changing primary physical custody requires proof of a substantial and continuing change in circumstances.

Parenting-Time Schedules
Adjusting the schedule within an existing joint custody arrangement doesn’t require the same proof. The court still considers whether the requested schedule serves the child’s best interests.

Support & Maintenance

To modify either obligation, the changed circumstances must be substantial and continuing enough to make the current terms unreasonable. Current income and other relevant financial circumstances can affect that analysis.

Form 14 is Missouri’s standardized calculation for determining a presumed child support amount from the parties’ financial information and other required factors. A difference of at least 20 percent between the existing amount and the amount calculated using current Form 14 circumstances can establish a prima facie showing of substantial and continuing changed circumstances, generally when the existing order was based on the Form 14 presumed amount. Prima facie means the evidence is sufficient to support the request unless rebutted.

Filing Timing, Income Changes & Relocation Notice

Missouri doesn’t impose a waiting period before a parent may file a motion to modify a custody order. An immediate filing doesn’t establish that the court should grant the request. The parent must still present facts that satisfy the standard for the particular modification sought.

A significant income change may affect whether an existing support amount remains appropriate. The analysis considers current financial circumstances and the applicable Form 14 calculation rather than the income figures used when the previous order was entered.

Relocating a Child’s Residence

Missouri relocation requirements involve separate notice and objection deadlines. A parent intending to relocate a child’s residence generally must provide 60 days’ written notice by certified mail. The notice allows the other parent to evaluate the proposed move and its effect on custody or visitation.

A parent opposing the relocation has 30 days to file a motion supported by an affidavit, which is a written statement sworn to be true. If no parent objects, the proposed relocation may proceed after 60 days without a court order. Because relocation can affect an existing custody schedule, legal review before notice is sent or the objection deadline passes can clarify the procedural requirements.