Here is the LINK for the process to evict a Tenant at Will:
(b) A tenancy at will.
(2) Requirement of notice.
(a) A periodic tenancy or a tenancy at will can be terminated by either the landlord or the tenant only by giving to the other party written notice complying with this section, unless any of the following conditions is met:
1. The parties have agreed expressly upon another method of termination and the parties' agreement is established by clear and convincing proof.
2. Termination has been effected by a surrender of the premises.
Length of notice. At least 28 days' notice must be given except in the following cases: If rent is payable on a basis less than monthly, notice at least equal to the rent-paying period is sufficient; all agricultural tenancies from year-to-year require at least 90 days' notice.
(4) Contents of notice. Notice must be in writing, formal or informal, and substantially inform the other party to the landlord-tenant relation of the intent to terminate the tenancy and the date of termination. A notice is not invalid because of errors in the notice which do not mislead, including omission of the name of one of several landlords or tenants.