Versions of Iowa Code 488.907 - Cancellation of certificate of authority -- effect of failure to have certificate on LawServer 2023 Iowa Code 488.907 – Cancellation of certificate of authority — effect of failure to have certificate 2022 Iowa Code 488.907 – Cancellation of certificate of authority — effect of failure to have certificate. 2020 Iowa Code 488.907 – Cancellation of certificate of authority — effect of failure to have certificate. 2018 Iowa Code 488.907 – Cancellation of certificate of authority — effect of failure to have certificate. 2016 Iowa Code 488.907 – Cancellation of certificate of authority 2014 Iowa Code 488.907 – Cancellation of certificate of authority – effect of failure to have certificate. 2009 Iowa Code 488.907 – Cancellation of certificate of authority — effect of failure to have certificate