30 Day Notice to Terminate Tenancy at Will for Residential from Landlord to Tenant - This form is used by a landlord to terminate an at-will residential lease by giving 30 days notice to the tenant. "Residential" includes a house, apartment, or condo. An "at-will" lease is one which may be terminated at any time, for any reason- or for no reason at all- by either the landlord or the tenant. Rent is typically payable on a monthly or yearly basis.