What are some possible defective notices that a tenant may receive?

A termination notice of less than 30 days, if the tenant has a month to month tenancy and has lived in the unit for less than a year, unless other terms have been approved in the rental agreement.
– A termination notice of less than 60 days, if the tenant has a month to month tenancy and has lived in the unit for more than a year.
– A notice of less than 30 days (or in some cases 60 days) to increase rent.
– A notice that is not written