Versions of Iowa Code 123.110 - Proof of sale on LawServer 2024 Iowa Code 123.110 – Proof of sale 2023 Iowa Code 123.110 – Proof of sale 2022 Iowa Code 123.110 – Proof of sale 2020 Iowa Code 123.110 – Proof of sale 2018 Iowa Code 123.110 – Proof of sale 2016 Iowa Code 123.110 – Proof of sale 2014 Iowa Code 123.110 – Proof of sale. 2009 Iowa Code 123.110 – Proof of sale