Co-signer Agreement

A Joint and Several Liability

A co-signer (medeondertekenaar or medeschuldenaar) is a person who signs a rental agreement along with the primary tenant. By doing so, they become a full legal party to the contract. This is a crucial distinction. The co-signer is not just a financial backstop; they are legally considered a tenant, with the same rights and, more importantly, the same obligations. This means they are 'jointly and severally' liable for the full extent of the lease terms. If the rent is not paid, the landlord can pursue the co-signer for the entire amount, not just a portion. If the property is damaged, the co-signer is equally responsible for the cost of repairs. This structure makes the co-signer a primary debtor in the eyes of the landlord.

A Rare and Risky Arrangement

In the Dutch rental market, true co-signer agreements are not common for residential leases, especially when the co-signer does not intend to live in the property. The primary reason is that this structure is often legally and practically messy. For the co-signer, the risk is immense, as their liability is total and direct. For the landlord, it can be complicated because a co-signer might inadvertently gain tenancy rights, making it more difficult to manage the property or evict the primary tenant if issues arise. Landlords and agents in the Netherlands overwhelmingly prefer a different structure: the guarantor agreement (borgstelling). This creates a clearer, more hierarchical relationship where the guarantor is a third party, separate from the lease itself. A prospective tenant offered a co-signer agreement should be extremely cautious and seek legal advice, as it is an unusual arrangement with significant legal consequences for the person co-signing.