What is a Documentary Proof of Citizenship (DPOC) Requirement to Register to Vote? -Documentary proof of citizenship policies require that before otherwise-eligible citizens can register to vote, they must provide paperwork showing that they are U.S. citizens in addition to their voter registration forms. For most people, that would mean providing a passport or a birth certificate to register. -Voters in Michigan and almost every state currently register by simply swearing or affirming in writing that they are citizens under penalty of perjury.
