Final answer:
A tenant typically needs to provide a written 30-day notice to a landlord to end a tenancy, including just cause if required by law, and is liable for additional costs if they overstay or fail to vacate their possessions.
Step-by-step explanation:
The period of notice a tenant usually has to give a landlord to end a tenancy is typically 30 days. This notice should be in writing, expressing the tenant's intention to terminate the lease. If local laws require a just cause for termination, this cause must be stated in the notice. Moreover, the tenant is responsible for ensuring all their belongings are removed and all keys and property furnished for their use are returned to the owner by the termination date. In cases where the tenant stays beyond the agreed termination date, or fails to clear their possessions, they may be liable for additional rent and damages.