Iowa Code § 570.5

The lien may be enforced by the commencement of an action, within the period above prescribed, for the rent alone, in which action the landlord shall be entitled to a writ of attachment, upon filing with the clerk a verified petition, stating that the action is commenced to recover rent accrued within one year previous thereto upon premises described in the petition; and the procedure thereunder shall be the same, as nearly as may be, as in other cases of attachment, except no bond shall be required.