Actually, I don't know what you mean. And since sometimes people, whether through ignorance of the law or otherwise, suggest things that are illegal (like changing the locks on tenants with whom they have a dispute), it's always worth pointing out that there is a substantial body of law which prescribes how landlord-tenant disputes shall be dealt with.
I would also draw your attention, in respect of posts #15 and #21 in this thread, to posting guideline 10.