Iowa Code § 615.1A

After the expiration of a period of ten years from the date of entry of judgment of a court not of record, or twenty years from the date of entry of judgment of a court of record, in an action on a claim for rent, exclusive of any time during which execution on the judgment was stayed pending a bankruptcy action or order of court, such judgment shall be null and void, all liens shall be extinguished, and no execution shall be issued. However, in the event that the judgment or the right to collect thereon is sold or otherwise assigned for value to a third party other than a state or federally chartered bank or credit union, such judgment shall be null and void, all liens shall be extinguished, and no execution shall be issued after the expiration of two years from the date of entry of the judgment, exclusive of any time during which execution on the judgment was stayed pending a bankruptcy action or order of court.