Guarantors and the Scope of Suretyship in Turkish Rental Contracts

Alongside a security deposit, Turkish landlords very often also demand a guarantor (kefil). A guarantee is a legally distinct form of security from a deposit: while a deposit rests on the tenant blocking their own money in a bank account, a guarantee means a third person personally assumes liability for the tenant's debts. The Turkish Code of Obligations (TCO, Law No. 6098) regulates suretyship in article 581 and following, and imposes strict formal rules designed to protect the guarantor. Not knowing these rules makes it harder for tenants to find a guarantor and, just as often, renders the guarantee clause in a lease invalid from the outset.

Legal Basis and How It Differs from a Deposit

Under TCO art. 581, a suretyship contract is one in which the guarantor undertakes to be personally liable to the creditor for the consequences of the debtor failing to perform. In a tenancy, this means the guarantor can be pursued out of their own assets for unpaid rent, dues, damage, or contractual compensation owed by the tenant. Whereas a deposit is capped by statute (at three months' rent), the guarantor's exposure is set by the maximum amount written into the contract. This makes a guarantee a far stronger security for the landlord and a far riskier commitment for the guarantor.

Validity Requirements of a Guarantee

The validity of a guarantee depends strictly on the formal rules in TCO art. 583. A suretyship contract is invalid unless it is made in writing and states both the maximum amount for which the guarantor is liable and the date of the guarantee. Moreover, the law requires these three elements—the maximum amount, the date, and any joint-and-several guarantor status—to be written in the guarantor's own handwriting. In practice, simply signing under the word "guarantor" at the bottom of a lease does not meet this requirement; if the handwritten elements are missing, the guarantee is void from the start.

The second core requirement is spousal consent. Under TCO art. 584, unless there is a court-ordered separation or a legal right to live apart, a married person may act as guarantor only with the written consent of their spouse, given no later than the moment the contract is formed. Apart from the exceptions for commercial-enterprise owners, the absence of spousal consent invalidates an ordinary rental guarantee. Later amendments that increase the guarantor's liability are likewise subject to the same formal requirement and spousal consent.

Ordinary vs. Joint-and-Several Suretyship

The type of guarantee determines when the landlord may turn to the guarantor. In an ordinary guarantee (TCO art. 585), the creditor cannot pursue the guarantor without first pursuing the principal debtor; only in defined cases—a certificate of definitive insolvency, bankruptcy, or the enforcement becoming impossible—may the creditor go directly to the guarantor. In a joint-and-several guarantee (TCO art. 586), the landlord may approach the guarantor directly, without pursuing the tenant, provided the tenant is in default and a notice has gone unanswered or the tenant is plainly insolvent.

In Turkish rental practice landlords almost invariably insist on a joint-and-several guarantee, because it removes the burden of chasing the tenant first and speeds up collection. But for joint-and-several status to arise validly, that wording too must appear in the guarantor's handwriting (art. 583). Without the handwritten phrase, the guarantee may at best survive as an ordinary one—significantly weakening the landlord's ability to reach the guarantor.

Scope, Duration, and Lease Renewals

A guarantee is not an open-ended burden. Under TCO art. 598, any guarantee given by a natural person automatically lapses ten years after the contract is formed; the term extends only through a written declaration in the guarantee's proper form, made at the earliest one year before it expires. In addition, when the principal debt ends, the guarantor is released.

For this reason, whether a guarantor's liability automatically extends to an indefinitely renewing lease is frequently disputed. Turkish courts, looking to the guarantor's intent and the maximum amount stated, are cautious about stretching a guarantee to cover increases and open-ended renewals the guarantor could not foresee. The safest course for a guarantor is to have the duration and the maximum amount written explicitly into the contract; for the landlord, it is to obtain written confirmation that the guarantee continues into renewed terms.

Practical Guidance for Foreign Nationals

Foreign tenants are often asked to present a guarantor resident in Turkey. Here it matters in practice that the guarantor holds assets that can be reached in Turkey; a guarantor living abroad may be legally valid but hard to collect from. For foreigners asked to serve as guarantors, the critical point is to fully understand the text before signing: what the maximum amount, the joint-and-several status, and the duration actually mean is often left underexplained. The spousal-consent requirement must not be overlooked for a married foreign guarantor either. Since the documents are drawn up in Turkish, independent legal review before signing—and a sworn translation where needed—prevents the heavy liability that can otherwise arise.

Frequently Asked Questions

Is signing under the word "guarantor" at the bottom of the lease enough? No. TCO art. 583 requires the maximum amount, the date of the guarantee, and any joint-and-several status to be written in the guarantor's own handwriting. If these are missing, the guarantee is invalid.

Can the landlord pursue the guarantor directly? If the guarantee is joint-and-several, yes—provided the tenant is in default and a notice has gone unanswered. In an ordinary guarantee, the tenant must, as a rule, be pursued first.

How long does my guarantee last? For a natural person, a guarantee automatically ends ten years after it is formed (art. 598). Whether your liability continues in an indefinitely renewed lease is assessed against the specific contract and your intent.

Do I need my spouse's consent if I am married? As a rule, yes. TCO art. 584 provides that a married person may act as guarantor only with the written consent of their spouse; without it the guarantee is invalid.

How Mona Hukuk Can Help

A guarantee creates a heavy liability that most tenants and guarantors do not appreciate—while the guarantee clause landlords rely on is frequently void for formal defects. At Mona Hukuk in Antalya, we advise tenants, guarantors, and landlords alike on reviewing the validity of guarantee contracts, limiting a guarantor's exposure, and setting up landlords' security in compliance with the law.

For advice in Antalya, you can write to contact@monahukuk.com or call +90 (242) 606 14 32.