How do I evict a tenant without a lease?

Many times I’m asked this question by landlords because they are under the impression that they cannot evict someone, or a tenant, if there is no lease agreement. This isn’t correct. What the landlord has established with a tenant when there’s no lease is probably an oral agreement, and the landlord has the absolute right to start an eviction process for nonpayment of rent, for instance, or termination of the oral tenancy agreement.