Iowa Code Title II. Elections and Official Duties [Chs. 39-79] § 49.86. Failure to vote--surrender of ballot

Any voter who, after receiving an official ballot, decides not to vote, shall, before entering the voting booth, surrender to the election officers the official ballot which has been given to the voter, and such fact shall be noted on the election records. A refusal to surrender such ballot shall subject the person so offending to immediate arrest and the penalties provided for violation of this chapter.