557A.19  Lienholder’s rights.
  Any purchaser who fails to object and specify the invalidity or defect contained in the time-share instrument within sixty days after receipt of written notice that the developer has assigned the receivables to the lienholder may not claim that the time-share instrument is invalid, void, or voidable in any subsequent action for enforcement of the collection of the receivables by the lienholder. The notice shall be by certified mail or personal delivery and state that the developer has assigned the receivables to the lienholder and that the purchaser has sixty days within which to object and specify the invalidity or defect contained within such instrument. Any objection shall be written and delivered by certified mail or personal delivery to the lienholder.
85 Acts, ch 155, §19