Many landlords believe they hold a solid endorser… until the day the tenant stops paying and the 'guarantor' replies that they never formally committed to anything. In most of these files, the problem isn't bad faith on the endorser's part: it's that the commitment was never express and written as the Civil Code of Quebec requires.
This article looks at the lease endorser from the angle of validity rather than renewal: what Article 2335 CCQ says, what counts as a valid suretyship, what does not, and how to have an endorser sign in a way you can actually enforce on default.
Endorser or guarantor? The right terminology
In everyday language people say 'endorser.' In Quebec legal language, the person who guarantees a tenant's obligations is a caution (guarantor), and the commitment is the cautionnement (suretyship) — Articles 2333 and following of the Civil Code of Quebec. Both words describe the same role in a residential lease: a person — often a parent or relative — who undertakes, toward the landlord, to pay if the tenant does not.
- The endorser (guarantor) commits to the landlord, not to the tenant
- It is a contract distinct from the lease, with its own validity requirements
- Its scope is strictly limited to what is stipulated — nothing can be added by interpretation
Article 2335: suretyship is not presumed, it must be express
Article 2335 CCQ sets the baseline rule: 'Suretyship is not presumed; it is effected only if it is express.' In concrete terms, no endorser commitment can be inferred from context, a conversation, or an implication. The person must have clearly and willingly expressed their intent to guarantee the tenant's obligations.
'Express' does not mean 'solemn': there is no required sacramental wording. But the intent to guarantee must be manifest and unequivocal. In practice this almost always means a signed writing identifying the endorser, the tenant, the guaranteed lease, and the scope of the commitment. Without that writing, a landlord trying to claim against the endorser must prove a commitment that, by definition, is not presumed.
What does NOT count as a valid suretyship
Here are the most common situations where a landlord wrongly believes they hold an enforceable endorser.
| Situation | Why it isn't enforceable |
|---|---|
| Verbal promise to 'vouch for' the tenant | Suretyship is not presumed — without an express writing, there is nothing to prove |
| Vague text or email ('I support him') | The intent to guarantee is neither manifest nor unequivocal |
| Endorser's name written on the lease, with no suretyship undertaking | Appearing on the lease is not the same as guaranteeing the tenant's obligations |
| Ambiguous co-signature (no 'as guarantor' mention) | A signature could mean a co-tenant, a witness… the intent must be clear |
| Commitment given after the fact, with no new signed document | No express writing supports the claim |
What makes an endorser commitment valid
For an endorsement to be truly enforceable, the writing must bring together clear elements. This is the minimum to turn good intentions into a usable guarantee.
- An express writing, signed by the endorser, where the intent to guarantee is explicit
- Clear identification of the endorser, the tenant, and the guaranteed lease (address, date, term)
- The precise scope of guaranteed obligations: rent, damages, costs — and any cap
- The duration of the commitment: the initial lease term and, if applicable, renewals (see below)
- Ideally, a suretyship contract separate from the lease rather than a single line added at the bottom of the form
A restrictively interpreted scope — the effect on renewal
The same logic that requires an express commitment also requires interpreting it restrictively: the endorser's obligation cannot be stretched beyond what they accepted. That's why suretyship given for a 12-month lease does not automatically extend when the lease renews — even though the lease itself renews by operation of law.
How to have an endorser sign properly
- 1Prepare a written suretyship contract, separate from the lease, rather than a mere mention.
- 2Clearly identify the endorser, the tenant, the unit and the guaranteed lease (dates, term).
- 3Expressly state the intent to guarantee and the scope of guaranteed obligations.
- 4Set the duration: initial term and, if desired, a clause covering renewals with withdrawal on written notice.
- 5Have it signed and dated; keep the original with the endorser's ID on file.
Common landlord mistakes
- Relying on a verbal promise or a text — suretyship is not presumed
- Writing the endorser's name on the lease with no express suretyship contract
- Leaving an ambiguous signature, without an 'as guarantor' mention
- Omitting the scope of guaranteed obligations — what isn't stipulated isn't guaranteed
- Forgetting the duration and renewal clause, then assuming the endorser is bound indefinitely