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Where to mail your WSIB documents

Mail WSIB claim forms, letters, and supporting documents to the Workplace Safety and Insurance Board, 200 Front Street West, Toronto ON M5V 3J1, Canada. This central Toronto address handles claim documents and general correspondence for the whole province — do not mail claim material to a regional WSIB office. Always write your claim number on every page.

Mail your WSIB documents — $6

$6 flat — postage included · no account needed

Mailing address

Verified August 2026

WSIB claim documents & correspondence

Workplace Safety and Insurance Board
200 Front Street West
Toronto ON  M5V 3J1
Canada

Workers, employers, and health professionals mailing claim forms (Form 6, 7, or 8), letters, appeals intent, or supporting documents

Mail your WSIB documents — $6

No printer, envelope, or stamp — we print and mail it the next business day.

Sources

Addresses verified August 2026 against official sources. Always confirm on the official site before time-sensitive filings.

Key facts

  • One central address handles claim mail for all of Ontario: 200 Front Street West, Toronto. The WSIB tells you not to mail claim documents to a regional office.
  • Write your claim number on every page you send — loose documents without a claim number are slow to match to a file and can be delayed.
  • The WSIB prefers online submission and says it is the fastest route, but mail remains accepted for people who cannot or would rather not file online.
  • Deadlines are tight in the workers’ comp system — a worker’s Form 6 is generally due within six months of the injury, and objections have their own limits, so mailing time counts against you.
  • A separate address in Hamilton (PO Box 2099, Stn LCD1, Hamilton ON L8N 4C5) is for the Collections Branch and premium payments — not for claim documents.

How to send your letter

  1. 1

    Confirm which form or letter you are sending

    Common WSIB mail includes the worker’s report (Form 6), the employer’s report (Form 7), the health professional’s report (Form 8), a letter objecting to a decision, or medical and wage documents supporting an existing claim.

  2. 2

    Put your claim number on everything

    Add your WSIB claim number to the top of every page. If your claim is brand new and has no number yet, include your full name, date of birth, and the date and details of the injury so the WSIB can open or find the file.

  3. 3

    Keep a copy for your records

    Photocopy or scan everything before it leaves your hands. If a decision or deadline is ever disputed, your dated copy plus proof of mailing is what protects you.

  4. 4

    Address it to the Toronto office

    Send it to the Workplace Safety and Insurance Board, 200 Front Street West, Toronto ON M5V 3J1. Do not use a regional office address for claim documents.

  5. 5

    Mail it — or let PostPal print and mail it

    Drop it in the mail with a mailing record for anything time-sensitive. Or upload your form and documents to PostPal and we print, envelope, and mail them to the WSIB for $6 flat, deposited with Canada Post the next business day.

Common questions

What is the mailing address for the WSIB?

Mail claim documents and general correspondence to the Workplace Safety and Insurance Board, 200 Front Street West, Toronto ON M5V 3J1, Canada. This one address serves all of Ontario — the WSIB asks that you not send claim documents to a regional office.

Where do I mail a WSIB Form 6, Form 7, or Form 8?

All three go to the same place: WSIB, 200 Front Street West, Toronto ON M5V 3J1. Form 6 is the worker’s report of injury, Form 7 is the employer’s report, and Form 8 is the health professional’s report. Write the claim number on each page, or your identifying details if the claim is new.

Can I submit WSIB documents online instead of mailing them?

Yes, and the WSIB says online is the fastest way. Many forms can be filed through its online services. Mail is still accepted, and is the practical choice when you have printed documents, a signature to include, or you would simply rather send a paper copy.

Should I use registered or tracked mail for WSIB documents?

For anything tied to a deadline — a Form 6, or a letter objecting to a decision — a mailing record is worth having so you can show when you sent it. Registered Mail with proof of delivery is the strongest option; at minimum, keep a dated copy of what you mailed.

Is the Hamilton PO box a WSIB address I can use?

That address (PO Box 2099, Stn LCD1, Hamilton ON L8N 4C5) is for the WSIB Collections Branch and premium payments from businesses — not for claim documents or worker correspondence. For claims and letters, use 200 Front Street West, Toronto ON M5V 3J1.

Can PostPal mail my WSIB documents?

Yes. Upload your completed WSIB form or letter and any supporting pages, and PostPal prints them, puts them in an envelope, and mails them to the WSIB in Toronto for $6 flat, deposited with Canada Post the next business day. You can add Registered Mail if you want tracked proof of delivery for a deadline-sensitive filing.

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