Case snapshot
At a glance
- Case
- Can an Employer Access Your WSIAT File Without Consent in Ontario?
- Court / Tribunal
- Workplace Safety and Insurance Appeals Tribunal
- Citation
- 2026 ONWSIAT 744 ↗
- Date
- July 7, 2026
- Area of law
- Employment Law
- Key issue
- Whether an employer has a right to access a worker's WSIAT file when the worker withholds consent, and whether certain sensitive medical records within that file must nonetheless be withheld or redacted.
- Outcome
- The employer's application for file access was granted in part: most claim-related documents were ordered released, but a significant set of sensitive medical records unrelated to the period in dispute were withheld or redacted.
- Why it matters
- Injured workers in Ontario need to know that withholding consent to file disclosure does not automatically block employer access — but it does trigger a process that can protect genuinely private medical information.
Legal principle
The rule from this case
Under the Workplace Safety and Insurance Appeals Tribunal's Practice Direction #3, both parties to a WSIAT appeal generally need access to relevant file materials to get a fair hearing. When a worker refuses to consent to disclosure, the dispute goes to a Vice-Chair who weighs relevance against sensitivity. Information that is relevant to the issues on appeal will ordinarily be released to the employer. However, the Tribunal has authority to withhold or redact records where their relevance is outweighed by how sensitive or prejudicial they are — particularly when the records deal with medical conditions that fall outside the period under review and would not meaningfully help either party or the decision-maker.
Important limits
What this does not mean
This decision does not mean that employers automatically receive everything in a worker's WSIAT file simply because they are a party to the appeal. A worker's refusal to consent is meaningful: it triggers a formal review process and gives the worker an opportunity to argue that specific records are too sensitive or too peripheral to be disclosed. The Vice-Chair must still conduct a document-by-document analysis. The ruling also does not establish that all medical records in a WSIB claim file are fair game. Records dealing with health conditions that arose well after the workplace incident and that have no bearing on the disputed entitlement periods can be withheld entirely. The principle is proportionality: relevance must outweigh sensitivity before disclosure is ordered.
Can an employer see your WSIAT appeal file without your permission?
No — not automatically. When an employer is a party to a WSIAT appeal, the Tribunal asks the worker to complete a consent form before releasing any file materials. If the worker refuses, the matter is referred to a Vice-Chair who decides what, if anything, gets disclosed. The worker’s objection is not simply overridden; it triggers a structured review.
This procedural protection matters because a worker’s WSIAT file can contain years of medical records, many of which may have nothing to do with the workplace injury being appealed.
What legal framework governs file access at the WSIAT?
The governing document is Practice Direction #3, titled “Consent for the WSIAT to Release a Worker’s Information.” It requires the Tribunal to ask the worker whether they consent to releasing their file to the employer and sets out a process when consent is withheld. The Workplace Safety and Insurance Act, 1997 gives the Tribunal authority to set its own practice and procedure, and it does so through this Practice Direction. The Freedom of Information and Protection of Privacy Act also applies to how the Tribunal handles personal information.
When consent is not given and mediation does not resolve the dispute, a Vice-Chair reviews the documents in question and weighs their relevance against their sensitivity.
What happened in this case?
In Decision No. 607/26I, 2026 ONWSIAT 744 (CanLII), a worker employed as a bus driver filed a WSIB claim after a June 2021 workplace incident involving a co-worker who directed racial slurs at her while she assisted customers. She was diagnosed with anxiety, depression, and a panic episode. After initial denials at the Board level, an Appeals Resolution Officer granted her entitlement for Chronic Mental Stress in 2023. A separate ARO decision in 2026 addressed her entitlement to Loss of Earnings benefits for specific periods.
Both the employer and the worker appealed different aspects of those decisions to the WSIAT. The employer then sought access to the worker’s full WSIAT file to prepare for the hearing. The worker objected to releasing certain documents, describing them as sensitive and irrelevant. The matter was sent to Vice-Chair R. Nairn for a ruling.
What did the Vice-Chair decide about which records could be released?
The Vice-Chair found that the bulk of the file — correspondence, claim forms, Board memoranda, and medical reports related to the mental health claim — was relevant to the issues on appeal and should be released to the employer. Both the employer’s appeal of the CMS entitlement and the worker’s appeal of the LOE benefit denials required access to that underlying material for a fair hearing.
However, the Vice-Chair reviewed the specific documents the worker flagged and agreed that a significant portion should be withheld. These were medical records from late 2024 through early 2026 dealing with health conditions entirely unrelated to the June 2021 workplace incident. They were both temporally distant from the period in dispute and medically unrelated to the mental health claim. Disclosing them would not have assisted either party or the eventual hearing panel.
What kinds of records were protected from disclosure?
The withheld records included mammogram results, breast ultrasound and biopsy reports, laboratory reports, pathology reports, emergency department notes, and cervical screening results — all from 2024 and 2025. Several clinical notes from the same physician covering that period were also withheld. In addition, certain entries within other clinical notes were ordered redacted so that only the portions unrelated to the sensitive conditions were released.
The Vice-Chair’s approach was document-by-document: each record was assessed for whether its relevance to the disputed issues justified disclosure given its sensitive nature. Records that were only marginally or peripherally relevant did not clear that bar.
Does an employer have a duty of confidentiality over records it receives?
Yes. The employer’s representative acknowledged this duty in submissions, and the Workplace Safety and Insurance Act, 1997 imposes an explicit obligation on employers to keep worker information confidential. The Tribunal reinforced this by ordering that any released records be used solely for workplace safety and insurance matters. Receiving access to a worker’s file does not give an employer licence to use that information for any other purpose.
Questions and records to discuss with a lawyer
- What medical records are currently in your WSIB or WSIAT file, and which of those relate to the injury or condition being appealed?
- Have you received a consent form from the WSIAT, and do you understand what you are being asked to release?
- Are there records in your file that deal with health conditions unrelated to your workplace claim that you believe should not be shared with your employer?
- Has your employer filed its own appeal of a WSIB decision that granted you benefits, and how does that affect what documents are in dispute?
- What steps can be taken to formally object to disclosure and request that specific records be withheld or redacted?
If you have questions about a WSIB claim, a WSIAT appeal, or how your rights as a worker intersect with your employment relationship, our Ontario employment law lawyers can help you understand your options. Workers in the Hamilton and Burlington areas can also reach our team through our Hamilton employment law page. If you are dealing with a related workplace dispute, our wrongful dismissal lawyers may also be able to assist.
To discuss your specific circumstances, reach out to UL Lawyers through /connect.
This article is automated commentary on a public court decision and is for general information only — not legal advice. Decisions rely on facts unique to each case. If you are affected by a similar issue, contact a lawyer for advice specific to your situation.
FAQ
Frequently asked questions
You can withhold consent, which triggers a formal review by a WSIAT Vice-Chair. The Vice-Chair will then decide which records, if any, must be released based on their relevance to the appeal issues and how sensitive they are. Withholding consent does not automatically block all disclosure, but it does protect genuinely private records.
Chronic Mental Stress (CMS) is a category of WSIB entitlement for workers whose mental health condition arises from a substantial work-related stressor, such as ongoing harassment or a hostile work environment. It is distinct from Traumatic Mental Stress, which requires a sudden, unexpected traumatic event. A worker must meet specific WSIB policy criteria to qualify.
Loss of Earnings (LOE) benefits compensate workers who cannot earn their pre-injury wages because of a work-related injury or illness. The WSIB assesses whether the worker's inability to work is caused by the compensable condition, and entitlement can be denied for periods where the clinical evidence does not support that link.