This guide is for a California motorcycle rider, passenger, family member, or representative who has possession of a helmet after a collision. Its task is narrower than a general crash checklist: identify the helmet, preserve its post-event condition, document each component without destructive testing, connect it to purchase and recall sources, and maintain a clear custody record.
The California motorcycle-accident service guide explains the broader claim area. The lane-splitting evidence guide addresses roadway position, surrounding traffic, video, and witnesses. This article addresses a different object and reader job: the helmet itself, its labels and retention system, its condition when recovered, who handled it, and what records can identify it.
Do not use this guide to decide that a helmet is safe to ride in, to diagnose a head injury, to recreate an impact, or to accuse a seller or manufacturer. Follow emergency and medical instructions first. Obtain qualified product, medical, and legal guidance before reuse, inspection, testing, repair, surrender, or disposal.

