Iowa Code § 335.20: Record advanced.

The board of adjustment shall not be required to return the original papers acted upon by the board, but it shall be sufficient to return certified or sworn copies of the originals or of such portions of the originals as may be called for by the writ under section 335.19. The return shall concisely set forth such other facts as may be pertinent and material to show the grounds of the decision appealed from and shall be verified.