In a lease agreement, the person who leases the property from its owner is called a Lessee or Tenant. Under the Civil and Commercial Code of Thailand, the pre-eminent law dealing with lease agreements, Lessees are held to certain responsibilities. According to the said law, the lessee is obligated to observe the following duties: he or she cannot use the property leased for a purpose other than those which are ordinary and usual, or which have been provided in the agreement; also, the lessee is bound to take as much care of the property hired as a person of ordinary prudence would take of his own property while undertaking to do ordinary maintenance and petty repairs. A Lessee is not only liable for his or her actions but for his or her inactions as well. In situations where the property hired is in need of repairs by the letter, or a preventive measure is required for avoiding a danger, or if a third person encroaches on the property hired or claims a right over it, the lessee is given the duty to inform the lessor of these otherwise he or she shall be held liable for damages incurred. Also, the lessee is prohibited from making any alterations to the property while he or she is in possession of the same. He or she may do so only when there is prior permission from the landlord. Lastly, the lessee is liable for any loss or damage caused to the property hired by his own fault or by the fault of persons living with him or his subhirer.
However, the lessee is not liable for loss or damage resulting from proper use.