How to serve an LTB notice in Ontario: the s.191 service rules

You can fill out a perfect N4 — right amount, right names, right termination date — and still lose at the Landlord and Tenant Board (LTB) because you served it the wrong way. Service is the step that quietly kills cases. If the method isn’t one the law allows, or you count the days wrong, the notice is void and your L1 eviction application gets thrown out — you start over with a fresh notice and a new clock.

How notices and documents are served is governed by section 191 of the Residential Tenancies Act, 2006 (the “RTA”) and the LTB’s published rules. This guide lists every permitted method, tells you the exact day each one counts as served (the “deemed” date that starts your notice period), and flags the methods that look fine but aren’t.

What “serving” a notice means — and what this covers

“Serving” (or “giving”) a notice means delivering it to the tenant in one of the ways the law recognizes. This guide is about a landlord serving a notice of termination — the N-forms like the N4 (non-payment), N5, N8, N12, or N13 — on a tenant. The same s.191 methods apply to all of them.

Serving an LTB application (like an L1) on the tenant, or filing with the Board itself, follows closely related rules, but the deadlines and the Certificate of Service are what matter there — we cover that at the end.

The legal methods of service, and when each one “counts”

The date a notice is deemed served is the date the law treats as the day the tenant received it — whether or not they actually read it that day. This is the date your notice period counts from, so it controls every deadline. Here is each permitted method and its deemed-service date:

Note the difference between the two “mail” rows: dropping the notice directly into the tenant’s mailbox at the building counts the same day, but sending it through Canada Post counts 5 days after mailing. Mixing these up is the single most common way landlords miscalculate a termination date.

How the deemed date controls your termination date

An N4 for a monthly tenancy needs a termination date at least 14 days after the notice is given (RTA s.59), counted from the day after service. The deemed-service date is what “given” means. So:

• Hand-delivered June 1 → served June 1 → day 1 is June 2 → earliest termination date June 15.
• Mailed June 1 → deemed served June 6 (mailing + 5 days) → day 1 is June 7 → earliest termination date June 20.

Same notice, same day in the mailbox, five days’ difference in the earliest legal termination date — purely because of how it was served. Put June 15 on a mailed N4 and the notice is void.

Methods that are not valid service

These feel reasonable but are not recognized methods for a notice of termination. Using them means the notice was never legally served:

• Taping or posting the notice on the outside of the door. The notice has to go under the door or through a mail slot — stuck to the front of the door doesn’t count.
• Text message / SMS. Email is the only electronic method allowed for a notice of termination, and only with written consent. A text is not recognized service.
• Telling the tenant verbally, or leaving a voicemail.
• Leaving it with a young child rather than an apparently adult occupant.
• Posting it on a community board, fridge, or in a common area.

Serving by email: the consent rule

Since a December 2020 change to the LTB’s rules, you can serve a notice of termination by email — but only if the tenant has agreed in writing to be served that way. That consent can be:

• a clause in the lease (the Ontario Standard Lease has an optional spot for email consent), or
• a signed copy of the LTB’s Consent to Service by Email form.

Two things landlords miss: consent can be revoked in writing at any time, so confirm it’s still in force before you rely on it; and without valid consent, an emailed notice is not properly served even if the tenant clearly received and read it. Past texts and emails about rent are not consent. When in doubt, hand-deliver or mail it.

The Certificate of Service: your proof

When you later file an application based on the notice — for an N4, that’s the L1 (see N4 vs L1) — you must give the LTB a copy of the notice and a Certificate of Service stating exactly how and when you served it. The Certificate is signed by the person who did the serving.

Without it, the LTB can refuse the application — and if the tenant denies receiving the notice, the Certificate is the proof that decides the point. Fill it out right after you serve, while the date, time, and method are fresh, and keep any backup: a photo of the notice in the mailbox, the courier tracking, the fax confirmation, or the sent email.

The service mistakes that void an LTB notice

• Forgetting the +5 days for regular mail. The termination date ends up too early and the whole notice is void.
• Using a method that isn’t on the list — taping to the door, a text message, a verbal heads-up.
• Relying on email without written consent (or after the tenant revoked it).
• No Certificate of Service when you file the application.
• Serving the wrong address — an old unit, a forwarding address, or a mailbox that isn’t the tenant’s.

For tenants: was the notice properly served?

If you received a notice, how it was served can matter as much as what it says. If it was taped to your door, texted to you, or emailed without your written consent, raise that at the hearing — improper service can be a defence. Either way, don’t ignore the notice: check the deadline, and if it’s an N4, remember you can still void it by paying within the notice period.

Where to find the official sources

LTB guidance on serving documents and the Certificate of Service: tribunalsontario.ca/ltb/forms-filing-and-fees. RTA full text (s.191 governs how notices are given): ontario.ca/laws/statute/06r17.

Important: Nest Mate is not a law firm and this guide isn’t legal advice. Service rules have edge cases — multiple tenants, units with no mail slot, a tenant who has moved out. If you’re unsure, contact a paralegal, ACTO, or your local legal aid clinic before you serve.