7 N4 Form Mistakes That Get Ontario Landlords Dismissed at the LTB

Mistake 1: Setting the Wrong Termination Date

The Termination Date on an N4 must be at least 14 days after the date the notice is served on the tenant. For monthly tenancies, there is a second requirement: the Termination Date must also fall on the last day of a rental period. Many landlords pick a date that is 14 days out but lands in the middle of the rental period, which makes the notice legally defective.

At an LTB hearing, a tenant or their representative can raise this error as a fatal defect. If the Member agrees, your L1 application will be dismissed and you will need to start the process over from the beginning with a fresh N4. To avoid this, always confirm that your Termination Date falls on the last day of a rental period and is no earlier than 14 days after the date of service.

Mistake 2: Including Charges Other Than Rent

The N4 form is strictly limited to unpaid rent. Ontario's Residential Tenancies Act, 2006 defines rent precisely, and many charges landlords assume are rent actually are not. NSF cheque fees, utility charges (unless the lease explicitly defines them as rent), parking fees not defined as rent, and damage claims must not appear anywhere in the N4 arrears table.

If you inflate the arrears figure by including any of these charges, the amount on the notice is wrong. The LTB Member may void the N4 on that basis, or reduce the amount you can claim, leaving you unable to recover those fees through the N4 route at all. Non-rent amounts can be pursued through a separate T1 or small claims process. Keep them off the N4 entirely.

Mistake 3: Name Mismatch with the Lease

Every tenant who is named on the lease agreement must be named on the N4 exactly as their name appears on that lease. Using a nickname, omitting a middle name that appears on the lease, or leaving off a co-tenant entirely can create problems when the LTB cross-references your documents.

A name mismatch gives tenants grounds to argue the notice was not properly addressed to them, which can lead to dismissal or adjournment of your hearing. Before you finalize the N4, pull out the original lease and copy the tenant names character for character. The same applies to the landlord name: use the full legal name or registered company name exactly as it appears in the tenancy agreement.

Mistake 4: Accepting Partial Payment After Serving the N4

Once you serve an N4, the tenant has two options: pay the full amount owing before the Termination Date, or vacate. If the tenant offers you a partial payment and you accept it, you have implicitly acknowledged a new or amended rental arrangement, and the existing N4 is voided. You cannot proceed to file an L1 based on an N4 that has been voided by your own acceptance of funds.

This catches many landlords off guard because accepting something feels better than accepting nothing. Legally, it resets the clock. You would need to serve a new N4 reflecting any revised balance, wait the full 14-day period again, and only then file an L1. If a tenant offers partial payment after service, consult a licensed paralegal before you decide whether to accept it.

Mistake 5: Wrong Service Method or Missing Certificate of Service

The Residential Tenancies Act sets out the permitted methods for serving an N4: hand delivery directly to the tenant, leaving the notice in the mailbox or under the door at the unit, first-class mail, or email if the tenant has given prior written consent. Serving the notice by text message, a photo sent through a messaging app, or any other informal method does not count under the Act.

Beyond the method, landlords must complete a Certificate of Service recording how and when the notice was served. This document is submitted with the L1 application, and without it the LTB may refuse to process your filing. Even if your underlying N4 is perfect, failing to prove proper service can end your application before a hearing is ever scheduled. Complete the Certificate of Service the same day you serve the notice while the details are fresh.

Mistake 6: Math Errors in the Arrears Table

The N4 requires you to list each rental period for which rent is owed along with the exact amount due for that period. Landlords frequently make arithmetic errors: listing the monthly rent figure for a period when the tenant actually made a partial payment, double-counting a month, or carrying forward a balance incorrectly from a previous partial payment.

At the LTB, the arrears figure on your N4 is compared against your rent ledger. If the numbers do not reconcile, the Member will question the validity of the notice. Even a small discrepancy can reduce the amount awarded or, in some cases, cause the Member to find the notice fundamentally defective. Build your arrears table from a clean rent ledger, account for every payment received, and double-check the total before you sign the form.

Mistake 7: Re-Using an Old N4

Every time you need to restart the eviction process, you must serve a brand-new N4. Landlords who have dealt with a non-paying tenant before sometimes make the mistake of resubmitting an N4 from a previous attempt, perhaps one that was voided when the tenant paid partially, or one that was withdrawn. An old N4 shows outdated dates, outdated arrears amounts, and may reference rental periods that have already been resolved.

The LTB requires that the N4 reflect the current state of the arrears at the time it is served. Re-using an old form almost guarantees that the dates and amounts will be wrong, which gives the tenant or the Member grounds to void the notice. Treat each new attempt as a clean start: fill out a fresh N4 with the correct current balance and the correct new Termination Date.