A study conducted by the Commonwealth concluded that 9.2% of registered voters in the state do not have a PennDOT issued photo ID. This article summarizes the study. The study does not take into account voters who do not have a PennDOT issued ID but may have one of the other forms of accepted photo ID (such as a passport or student ID). It also includes inactive voters (those who have not voted in the last five years) and, therefore, may include people who no longer live in Pennsylvania. However, the study does show that the Commonwealth’s previous estimate – that 99% of voters in the state already have photo ID — was overly optimistic.