Law / United States / 
Missouri
HB 1839 (HCS HBs 1839, 2921 and 3015), Age Verification on Adult Websites
Section 407.3405, RSMo, as created by 2026 Mo. Laws, HCS HBs 1839, 2921 & 3015
A citation is an address, not a summary. The first part names the law; what follows narrows it to the exact section, article or paragraph.
What follows is LexLint's own research summary of this law, not legal advice.
In force 26 days, effective 28 August 2026.
An adult content age verification (AV) rule binding private bodies.
As of 16 July 2026.
What this law does
Drafted with AI from the cited sources under the direction of UnGovr staff. UnGovr holds editorial responsibility for this page.
Codifies the age verification requirement for commercial websites where at least one third of published material is harmful to minors into statute, requiring reasonable age verification, a bar on retaining identifying information, and mandated warning notices about mental health resources, enforced by the Attorney General. Signed by the governor on July 9, 2026; effective August 28, 2026.
If you get it wrong
Private right of actionNo
Penalties
Civil penalties up to 10,000 dollars per day, plus up to 250,000 dollars if a minor accessed the content
Who enforces it
Enforcement body
Missouri Attorney General
What it reaches
Age threshold
18
Covered services
Commercial websites where 33 percent or more of published material is harmful to minors
Verification methods
Gov ID, Transactional data, Third party service
When LexLint raises it
publishes_adult_content
Read the law
Every line above is drawn from the primary source linked here, read on the date shown. This is a research summary, not legal advice.