Eviction procedures will vary by state, but the proper procedure must be followed by the property manager or owner.  A tenant is usually evicted or ejected because of nonpayment of rent, unlawful use of the premises or noncompliance with health and safety codes. 

Actual eviction is when the landlord files a suit for possession because the tenant has breached the lease.  Constructive eviction is when the landlord breaches the lease and the tenant must leave the premises because they have become uninhabitable.