On October 1, 2019, tougher rules against black market trading of rental contracts and illegal subletting come into force. Among other things, the new rules make it a crime to sublet without a permit. Another change is that it will also be illegal to buy a tenant apartment lease; previously it has only been illegal to sell tenant leases. The new rules on subletting and apartment swaps will be of great help to landlords and it will be important to inform the residents,” says Liselott Rosecrans, real estate lawyer at Fastighetsägarna.