Will a diagnosis letter work for federal public service accommodations?

In most federal workplaces the Passport, not a letter, starts the conversation

The Government of Canada Workplace Accessibility Passport is the tool federal public servants use to record the barriers they face at work and the solutions that address them. Its guidance is explicit: you do not need to provide documentation, like a medical note, to complete your Passport, and you do not need to self-declare your disability to your employer. The Passport is private and accessible only to you unless you choose to share it with your manager.

That changes what a diagnosis letter is for. It is not a ticket you must hand over. It is background you may choose to draw on when you describe your barriers, for example difficulty sustaining attention in an open-plan office or losing track of multi-step tasks that arrive verbally.

Professional evaluations come in only when you and your manager cannot identify effective solutions on your own. The guidance also recommends keeping a Word backup of your Passport so you avoid renegotiating supports each time you change jobs, organizations or managers, which matters more over a federal career than any single letter.

When a manager does ask, the rule is functional limitations, not diagnosis

Federal guidance for managers on the duty to accommodate states that the employer is not usually entitled to know the exact diagnosis, treatment or medications. The Treasury Board's Privacy Implementation Notice 2022-03 on requests for accommodation, updated in 2025, says the employer is not entitled to know the exact diagnosis or treatments prescribed, that the word of a treating physician is sufficient to verify whether an employee requires an accommodation, that requests must focus on the functional limitations and safety issues at hand, and that managers should not request any more information than what is required to make a decision.

The same manager guidance says a new assessment should not be requested unless job duties have significantly changed or personal circumstances affecting performance have changed, and that private information is shared strictly on a need-to-know basis under the Privacy Act. The Directive on the Duty to Accommodate, in force since April 2020, puts the responsibility on you to tell your manager about your functional limitations or work-related needs, and on the manager to obtain your consent before seeking information from a medical practitioner.

A letter therefore does its job when it leads with limitations and solutions. You decide whether the word ADHD appears at all. The Ontario Human Rights Commission takes the same position for provincially regulated workplaces, described in how to get an ADHD diagnosis recognized at work.

Applying for a federal job is different: PSC testing requires professional documentation

Accommodation during a hiring process is handled by the Public Service Commission of Canada (PSC), and the standard is higher. Candidates cannot send a request directly to the PSC; you notify the hiring organization's HR, and HR makes the request on your behalf. For a non-evident or complex condition, the PSC's required-documentation page says you may be asked for a form filled out by a healthcare professional, most often a physician. Its guide on assessing persons with ADHD says a report of an assessment conducted by a qualified professional in the field, accredited by the appropriate regulated professional association, is required, and that it should describe the nature and extent of your functional limitations, give an interpretative summary of any test results, and note how you compensate for them.

The PSC lists typical test accommodations for ADHD: an individual session in a quiet room free from distracting noise, additional time, breaking long sessions into shorter segments with extra breaks, sound-suppression earphones or white noise, and movement breaks. Once all documentation is in, the PSC usually sends its decision to HR within 10 business days; adapted test formats take 15 to 40.

What to have the clinician put in the letter so HR can act on it

Whether the reader is your manager or a PSC assessor, the useful content is the same. Ask for:

• Confirmation that you have a condition that is a disability under the Canadian Human Rights Act, stated without naming a diagnosis if you prefer
• Functional limitations in plain terms: sustaining attention, working memory for verbal instructions, time estimation, sensitivity to noise
• Recommended accommodations that map to those limitations, such as written follow-ups after meetings, a quieter workstation, or extra time on written assessments
• Whether the limitations are permanent, temporary or episodic, which is the language the Accessible Canada Act uses to define disability
• The clinician's designation and registration number, dated, on letterhead

The Finding Focus $49 standard diagnosis letter confirms the diagnosis and treatment plan, and clinicians can include recommended accommodations in the documentation they prepare, so share the department's form or checklist when you request it through your patient portal. Document-preparation fees are shown at the time of request. If a PSC assessor asks for the fuller assessment record, the $99 healthcare-provider report summarizes the assessment, diagnosis and treatment plan. The background on both documents is in what ADHD documentation you can get for work or school.

The Canadian Human Rights Act and the Accessible Canada Act back the request

Federal departments are federally regulated employers, so the Canadian Human Rights Act applies rather than a provincial code. Disability is a prohibited ground of discrimination under section 3, section 7 covers employment, and section 15(2) requires that needs be accommodated unless doing so would impose undue hardship considering health, safety and cost. The Accessible Canada Act, passed in 2019, commits the federal government to a Canada without barriers on or before January 1, 2040, names employment as a priority area, and defines disability to include impairments that are permanent, temporary or episodic.

None of this obliges you to disclose ADHD by name, and none of it lets a department demand a psychiatrist's report where a description of limitations would do. If you have not yet been assessed and suspect ADHD is behind the barriers you keep hitting, an online ADHD assessment is how you find out whether you have ADHD; the free screener is only a first check, not a diagnosis.