How to File an L3 or L4 Application

Before you start: L3 vs. L4, know which you need

L3 and L4 applications both deal with agreements between a landlord and tenant, but they're used for different situations. An L3 application generally asks the LTB to issue an order based on an agreement the landlord and tenant have already reached to end the tenancy — often following an N11 (Agreement to End the Tenancy) — where the landlord needs the Board's help enforcing that agreement, for example because the tenant hasn't moved out as agreed. An L4 application, by contrast, generally asks the LTB to enforce an agreement the parties reached to resolve an earlier application, such as a payment plan agreed to settle an L1 for unpaid rent, where the tenant has since broken that agreement.

Before filing either, confirm you're using the correct form for your actual situation: if there was never a signed agreement to end the tenancy or settle a prior application, neither L3 nor L4 is generally the right tool, and a different application type may be needed instead. Taking a few extra minutes at this stage to double-check which form actually fits your facts can save considerable time later, since filing the wrong type generally means starting the process again from the beginning.

Step 1: Confirm you have a valid tenant agreement or N11

For an L3 based on an N11, confirm:

1. The N11 was signed by the tenant (and, where relevant, by you), with a clear move-out date stated.
2. The agreed move-out date has passed and the tenant has not vacated as agreed.
3. You have the original signed N11 or agreement available to submit with the application.

For an L4 based on a settlement of an earlier LTB application, confirm:

1. The settlement or mediated agreement was properly documented, ideally through the LTB's own mediation process or a signed consent order.
2. The tenant has broken a specific term of that agreement, such as missing an agreed payment.
3. You have a copy of the agreement itself to submit with the application.

Step 2: For an L4, identify exactly what was breached

An L4 application generally needs to point to a specific broken term, not just a general sense that things haven't gone well. Go through the agreement line by line and identify precisely which term was breached, when, and by how much — for example, a missed instalment on a repayment plan, a missed date, or a condition that wasn't met. Keep your own ledger or tracking record showing exactly how the tenant's actual conduct diverged from what was agreed, since the LTB will generally want to see this comparison clearly laid out rather than described only in general terms.

Step 3: Gather your supporting documents

Before filing, assemble:

1. The signed N11 or settlement agreement itself.
2. Your rent ledger or payment tracking record, updated to the filing date.
3. Any written communication with the tenant about the agreement, including reminders sent about upcoming deadlines or missed terms.
4. The original application number, if the agreement arose from settling an earlier LTB case, since the L4 is generally tied back to that file.

Step 4: Complete and file the application

Work through the form methodically:

1. Select the correct application type — L3 for an N11-based agreement to end the tenancy, or L4 for breach of a settlement reached on an earlier application.
2. Enter the tenant's and landlord's details and the rental unit address exactly as they appear on the agreement.
3. Attach the signed agreement and describe clearly what term was broken and when.
4. File through the Tribunals Ontario Portal where available, or by the paper process, and pay the applicable filing fee, which generally varies by filing method and can change periodically.

Take extra care with the section describing the breach itself. A description that simply says the tenant "didn't comply" is generally much weaker than one that states precisely which clause of the agreement was broken, the date it should have been met, and what, if anything, the tenant actually did instead. Think of this section as the part of the application an adjudicator will read most closely, and write it accordingly, with dates and amounts rather than general impressions.

What happens after you file

Depending on the specific circumstances, some L3 and L4 applications may be reviewed by the LTB without a full hearing, particularly where the agreement and the breach are clear and undisputed; others may proceed to a hearing where the tenant can respond and present their own evidence. In either case, the tenant will generally be served with the application and given an opportunity to respond. Keep tracking any communication or partial compliance that occurs after filing, since this can affect how the Board treats the application.

It's also worth being prepared for the possibility that the tenant partially complies after you file, for example by making a late payment on a broken repayment plan. This doesn't necessarily resolve the application on its own, but the LTB may take any such developments into account, so continuing to update your own records right up to any hearing or review date is generally a good practice rather than treating your filing-date records as final.

Preparing for the hearing, if one is required

If a hearing is scheduled, focus on the agreement and the breach specifically:

1. Bring the original signed agreement and any related correspondence.
2. Bring your updated ledger or tracking record showing exactly how the breach occurred.
3. Be ready to address anything the tenant raises about why they didn't comply, such as a dispute about the agreement's terms.
4. Review our LTB hearing guide and consider representation by a paralegal or lawyer if the agreement is complex or the amounts involved are significant.

Common mistakes that cause delay or rejection

Filing an L3 when there was never a properly signed N11, or filing an L4 without a clearly documented settlement agreement, is a common and avoidable problem, since both applications generally depend on that underlying document existing. Landlords also sometimes describe the breach too generally rather than pointing to the specific term and date involved, which can slow down the Board's review. Another frequent issue is letting too much time pass after a breach before filing, without a clear explanation for the delay, which can raise questions about whether the agreement is still being relied on consistently. Finally, failing to bring the original signed agreement to a hearing — relying instead on a description of what it said — generally weakens the application considerably.

Landlords sometimes also assume that because an agreement was reached through LTB mediation, enforcing it afterward will be quicker or more automatic than it generally is. Even a mediated agreement generally needs to go through the L3 or L4 process in the usual way if it's broken, so it's worth planning for the same timeline and documentation requirements as any other application rather than expecting a shortcut.

Frequently Asked Questions

Related reading

Reviewed by Ryan J. Manilla, BA, JD

Legal Reviewer · Landlord Tenant Ontario