HB 439 introduces measures to improve voter registration record maintenance and strengthen mail-in ballot review processes to enhance election integrity. The bill requires voter registrars to retain voter registration applications of individuals removed from the voter rolls and make them accessible as public records, excluding confidential information. It also mandates that registrars and early voting clerks maintain detailed records of mail-in ballot applications and envelopes, ensuring electronic records meet specific documentation standards. The signature verification process is enhanced by requiring committees to compare ballot application signatures with additional records on file and applying stricter rules for reviewing mail-in ballots. Criminal penalties, classified as Class A misdemeanors, are established for registrars, clerks, and committee members who fail to comply with these requirements. The act takes effect on September 1, 2025, and applies to elections ordered after this date.