State law does not authorize or require signature comparison as a part of the voting process or during any post-election recount or audit. Instead, for security purposes, Wisconsin requires most absentee voters to show or provide a copy of their photo ID when requesting a ballot.
As a part of the absentee ballot counting process, every absentee certificate envelope is checked to ensure the voter and witness signed the certificate. However, nothing in Wisconsin law establishes a process for comparing those signatures, as there is not necessarily any original signature for them to be compared with. Signature matching is a specialized field, and Wisconsin election officials have received no training or certification in signature matching. For those reasons, conducting an audit of absentee voters’ signatures would be impractical and unwarranted.