# Workplace Safety and Insurance Board fax numbers for Ontario claim documents and appeals

Find WSIB fax routes for claim/account correspondence, appeals and collections in Ontario.

Country: Canada
Category: Insurance
Last reviewed: 2026-10-04 (published sources, not a test transmission)

## Which Workplace Safety and Insurance Board fax number should I use?

Use the general fax pair for correspondence following your claim or account form. Appeals and Collections each have a separate line. The local and toll-free general numbers are alternatives, not two required submissions.

## Claim and account correspondence — local

Fax: +1 416 344 4684
E.164: +14163444684

Send documents using your WSIB form’s instructions.

Use only when: General WSIB fax. Use the Appeals or Collections line when the correspondence concerns those departments.

[WSIB department contacts](https://www.wsib.ca/en/contact-us) — reviewed 2026-10-04

## Claim and account correspondence — toll-free

Fax: +1 888 313 7373
E.164: +18883137373

Toll-free number; service and international charges may still apply.

Alternative to the general local fax.

Use only when: Send once to either the local or toll-free destination; use a department-specific route when instructed.

[WSIB department contacts](https://www.wsib.ca/en/contact-us) — reviewed 2026-10-04

## Appeals

Fax: +1 416 344 3600
E.164: +14163443600

Send correspondence to WSIB Appeals.

Use only when: Follow the current appeal form or case instructions, including submission requirements and deadlines.

[WSIB Appeals contact](https://www.wsib.ca/en/contact-us) — reviewed 2026-10-04

## Collections Branch

Fax: +1 905 521 4203
E.164: +19055214203

Send Collections Branch correspondence.

Use only when: For employer-account collections matters; include the reference on your collections notice.

[WSIB Collections Branch contact](https://www.wsib.ca/en/contact-us) — reviewed 2026-10-04

## What to include in your fax to Workplace Safety and Insurance Board

Send the applicable WSIB form and requested attachments. Identify the claim or employer account and follow the instructions on an appeal or collections notice. Online document submission is also available.

## Check the destination and prepare your cover page

Include the claim/account number, intended department, callback details and page count.

Check the official source and recipient instructions before sending. A reviewed source confirms a published number, not live availability.

## Confirm delivery and follow up with Workplace Safety and Insurance Board

These are fax destinations, not voice support lines. Keep the transmission result and a copy of the documents. Confirm with the receiving department that the packet is complete and can be processed; a delivery receipt does not establish acceptance or a decision. Check with that department before sending a duplicate.

## How to fax Workplace Safety and Insurance Board without a fax machine

Prepare a legible PDF, verify the department and number, review the pages and authorize sending. DearFax supports [online sending](https://dearfax.com/send-fax-online) and workflows with [ChatGPT](https://dearfax.com/chatgpt) or [Codex](https://dearfax.com/codex) through [MCP](https://dearfax.com/mcp). Retain the transmission result.

## Frequently asked questions

### What Workplace Safety and Insurance Board fax number should I use?

Claim and account correspondence — local: +1 416 344 4684. Claim and account correspondence — toll-free: +1 888 313 7373. Appeals: +1 416 344 3600. Collections Branch: +1 905 521 4203. Use the general fax pair for correspondence following your claim or account form. Appeals and Collections each have a separate line. The local and toll-free general numbers are alternatives, not two required submissions.

### Should I send my documents to both WSIB general numbers?

No. They are local and toll-free alternatives. Choose one and retain the transmission result; duplicate faxes can create duplicate correspondence.

### What documents can I fax to Workplace Safety and Insurance Board?

Send the applicable WSIB form and requested attachments. Identify the claim or employer account and follow the instructions on an appeal or collections notice. Online document submission is also available.

### What should I put on a fax cover page for Workplace Safety and Insurance Board?

Include the claim/account number, intended department, callback details and page count.

### How can I fax Workplace Safety and Insurance Board without a fax machine?

Prepare your documents as a legible PDF and confirm the recipient’s submission requirements. You can use DearFax in your browser or prepare the fax with ChatGPT or Codex through MCP. Review the number and pages before authorizing the send, then keep the transmission result. Delivery does not confirm that the recipient accepted or processed your request.

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