Hi there, I live with another girl and a couple. I have lived in this property for 2 years but none of us are on the lease. The last tenant on the lease moved out about 6 months ago. Since then the couple have refused to pay bills and rent on time and this month when I notified them of amounts owing the girl said she didn't believe me and refused to pay rent and bills. They are both interstate until the 17th and rent is due on the first..... I have informed the landlord of what is happening and my intention to replace them with new tenants. I'm wondering how to go about this legally? We do not have a valid lease agreement. Can we just change the locks or must we wait until they don't pay before giving them an eviction notice?