555A.2  Contract.
  Every seller shall furnish the buyer with a fully completed receipt or copy of any contract pertaining to a door-to-door sale at the time of its execution, which is in the same language as that principally used in the oral sales presentation and which shows the date of the transaction and contains the name and address of the seller, and in immediate proximity to the space reserved in the contract for the signature of the buyer or on the front page of the receipt if a contract is not used and in boldface type of a minimum size of ten points, a statement in substantially the following form:
  You, the buyer, may cancel this transaction at any time prior to midnight of the third business day after the date of this transaction. See the attached notice of cancellation form for an explanation of this right.
[C75, 77, §713B.2; C79, 81, §82.2]
C93, §555A.2