If you are certain that the tenants have completely vacated and will not be returning, take pictures to document the unit and then change the locks. If the tenant owes money for arrears of rent or damages, you can file an application with the Landlord and Tenant Board but it may be difficult if the tenants are in another country. As of September 1, 2021, landlords can file an application for arrears of rent and/or damages with the LTB within one year from the date the tenant was no longer in possession of the rental unit.The tenant must have moved out of the rental unit on or after September 1, 2021. However, this is only possible if you have the current residential address of the tenant.