The rental contract was not signed by the landlord himself. If it is signed by the person authorized by the landlord, or by the lessee who sublets with the consent of the landlord, the lease contract is valid. Without the authorization of the landlord and the permission of subletting, the contract is invalid unless it meets the agency by estoppel.

legal ground

Article 16 1 of the Civil Code

A civil subject may carry out a civil juristic act through an agent.

In accordance with the provisions of the law, the agreement of the parties or the nature of civil legal acts, civil legal acts that should be implemented by themselves shall not be represented.

Article 162

A civil juristic act carried out by an agent in the name of the principal within the scope of agency authority is effective for the principal.

Chapter seven hundred and sixteen

With the consent of the lessor, the lessee may sublet the lease item to a third party. If the lessee sublets, the lease contract between the lessee and the lessor shall remain valid; If a third party causes losses to the lease item, the lessee shall compensate for the losses.

If the lessee sublets without the consent of the lessor, the lessor may terminate the contract.