Appeals: Disagreeing with a decision of the ARO

The Appeals Resolution Officer (ARO) decision is the final decision of the WSIB. If you disagree with this final decision it can be appealed to the Workplace Safety and Insurance Appeals Tribunal (WSIAT), the external and final level of appeal of worker’s compensation decisions. The letter attached to the decision provides information about how to start an appeal to WSIAT.

Alternatively, you can request a reconsideration of the Appeals Resolution Officer decision. You need to provide a letter to the Appeals Resolution Officer explaining how the request meets the criteria for reconsideration.

The reconsideration criteria are:

  • a substantive defect in the decision or the decision-making process that may reasonably affect the outcome;
  • failure to properly apply the act or approved WSIB policy;
  • significant new evidence that did not exist at the time the decision was made, and that is relevant to the issue(s) under appeal; or
  • a typographical error that impacts the decision.

Additional detailed information on the reconsideration process is outlined in the Appeals Services Division Practice and Procedures.

Appeals Services Division Practices and Procedures

Track your appeal status online

People with claims and businesses can sign up for our secure online services to track the status of an appeal any time and get updates faster, as well as see resolved appeals. They can also submit documents straight to their file and send us messages, all in one convenient place.

Make sure you have the claim number and personal identification number (PIN) ready, you should have received both in the mail. If you don’t have this information, call us at 1-800-387-0750 from 7:30 a.m. to 7:45 p.m. Monday to Friday and we can provide it to you.


  • (PDF) (send by email or mail)
  • Appeal Readiness (Mailed to you, along with your claim file record, once you have submitted an intent to object form)

Learn more