“Red flag law” is the popular name; the formal term in most statutes is Extreme Risk Protection Order, or ERPO. The process is more procedurally involved than either supporters or critics usually describe, and the details vary meaningfully by state.

What an ERPO actually is

An ERPO is a court order that temporarily restricts a specific person’s access to firearms, based on a petition that they pose a danger to themselves or others. It is not a criminal charge and doesn’t require one — it’s a civil process, which is exactly the part that draws the most legal debate, since the standard of proof in civil proceedings is lower than in criminal court.

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Who can petition, and who can’t

This is one of the biggest points of state-to-state variation. Every ERPO state allows law enforcement to petition. Beyond that, states differ on whether family members, household members, medical professionals, co-workers, or school officials can also file — some states keep the petitioner list narrow, others extend it considerably. Checking the specific state’s eligible-petitioner list matters, because it directly determines how the law can actually be used in practice.

The actual process, step by step

Generally: a petition is filed, a judge reviews it for an initial (often temporary, short-duration) order, the subject of the order is then notified and gets a hearing, and at that hearing a judge decides whether to extend the order for a longer period. The initial order can sometimes be granted before the subject is notified — the “ex parte” stage — which is the specific piece of the process that draws the most due-process criticism, since a person can temporarily lose firearm access before they’ve had a chance to respond in court.

What’s still legally unsettled

Constitutional challenges to ERPO laws continue to work through courts in various states, generally centered on due process timing (how long before a hearing is guaranteed) and evidentiary standard (how much proof is required at each stage). This is a live legal area — treat any specific claim about an ERPO law’s constitutionality as current only as of when it was written, not settled permanently.