Workers’ Compensation · Primary-source case analysis

Wagner: Failure to Provide a Claim Form Can Start the Compensability Clock

By Aneeta Mishra and Timothy Chan

Published September 13, 2026

Wagner v. Allied Signal Aerospace addresses when an employer’s failure to provide a DWC-1 claim form affects the ninety-day presumption under Labor Code section 5402.

The employee’s records described work stress

The employee’s personnel and medical records contained complaints about industrial stress and workplace treatment. A formal claim form came later, and the employer denied the claim within ninety days of receiving that form.

Receipt of a filed claim ordinarily starts ninety days

The Board held that the statutory period generally begins when the employee serves the completed claim form on the employer. That rule supplies a concrete filing event for the investigation period.

A breached claim-form duty can move the start date

An employer must provide the form within one working day after notice or knowledge of an injury requiring treatment beyond first aid or lost time. The duty arises when the employer is reasonably certain that an industrial injury occurred or is being claimed; delaying the form cannot extend the investigation period.

The case returned for factual findings

The WCAB rescinded the presumed-compensability finding and remanded because the judge had not applied the newly announced reasonable-certainty standard. The record required findings about who knew what, when, and whether that knowledge was attributable to the employer.

Key takeaways

• Record the first notice of a possible industrial injury.
• Provide the claim form promptly when reasonable certainty exists.
• Calculate the section 5402 period from the legally operative event.
• Develop evidence identifying whose knowledge is imputed to the employer.