Iowa Code
Chapter 648 - FORCIBLE ENTRY AND DETAINER
Section 648.4 - Notice terminating tenancy.

648.4 Notice terminating tenancy.
When the tenancy is at will and the action is based on the ground of the nonpayment of rent when due, no notice of the termination of the tenancy other than the three-day notice need be given before beginning the action.
[C24, 27, 31, 35, 39, §12266; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §648.4]
Farm tenancies, §562.5 – 562.8
See also §562.4, chapters 562A, 562B