When do I need to file a Certificate of Service?

You need to file a Certificate of Service whenever the LTB requires proof that you served documents to the other party. For L10 applications (former tenants), you must file it at least 20 days before the hearing. Other applications have different requirements.

What are the different service methods?

You can serve documents by: (A) handing directly to the person, (B) leaving in their mailbox, (C) sliding under their door, (D) regular mail (+5 days), (E) courier (+1 business day), (F) fax (if agreed), or (G) email (if agreed). Methods F and G require prior written agreement.

How does mailing affect the service date?

If you serve by regular mail, the document is considered served 5 days after you mail it. For courier, it's 1 business day after you send it. Plan accordingly to meet service deadlines.

Can someone else serve the documents for me?

Yes, another person (like a process server, representative, or agent) can serve documents on your behalf. That person should then complete and sign the Certificate of Service.

What if I can't find the person to serve?

You can serve at their last known address using methods B, C, or D. If you truly cannot serve them, you may apply to the LTB for alternative service methods or to waive the service requirement.

Certificate of Service Ontario 2026 - Free LTB Proof of Service Form