It depends upon the reason for eviction and the length of the tenant’s occupancy. The appropriate notice of eviction to serve for non-payment of rent would be a 3 Day Notice to Pay or Quit or a 30 or 60 Day Notice to Vacate. If the tenant has been there for less than a year paying on a month-to-month basis and you want to terminate their tenancy, a 30 Day Notice to Vacate is the correct form to serve. If the tenant has been there for over a year, use a 60 Day Notice to Vacate. Commercial leases differ from residential leases in that you have to make sure that you serve the right person or agent for that corporation or LLC. Serving the correct notice is the critical first step in beginning the eviction process so you can legally file an Unlawful Detainer complaint against the unwanted tenant.