Voter Roll Database Match Auditor — Cross-System Verification & Error Rate Workbench

Matching Configuration

Simulate DHS SAVE / USCIS cross-referencing against State Voter Files

Audit Scenario Presets

Loads empirical match thresholds and estimated citizenship lag profiles.

Registered Roll Sample Size 100,000

Simulated registered voter universe under list maintenance review.

Match Confidence Threshold 80%

Minimum cross-database similarity score to issue a challenge/notice.

Database Update Latency (USCIS/SAVE Lag) 18 mo

Delay between naturalization ceremony and secondary database refresh.

Naturalized Citizen Population 6.5%

Percentage of registered voters who previously held lawful immigrant status.

Days Until Federal Election 72 days

NVRA 52 U.S.C. § 20507(c)(2)(A) mandates a 90-day systematic removal freeze.

Model pipeline synchronized. 100,000 voter cohort simulated.

False Positive Flag Rate 94.2% ~3,480 eligible citizens flagged

Total Removal Notices Generated 3,694 3.69% of registered voter roll

Confirmed Non-Citizen Matches 214 Verified active non-citizens on file

Disenfranchisement Vulnerability CRITICAL High risk of wrongful disenfranchisement

Match Confidence Score Density & Decision Boundary Cutoff: 80%

● Eligible Naturalized Citizens (Stale Immigration Record) ● Unverified / Typo Mismatches ● Valid True Ineligibility Matches

Statutory Legal Status (NVRA)

VIOLATION: Within 90-Day Quiet Freeze

Federal law (52 U.S.C. § 20507) prohibits states from conducting systematic voter list purges within 90 days of a federal election. Notice mailings with cancellation deadlines are currently enjoined under binding precedent.

Required Notice Period: 30 Days Response Window

Required Verification Level: Multi-Source Affirmative Proof

Sample Audit Records (Simulated Pipeline Output)

Voter ID / Anonymized	Registration Date	Matched DHS Data Source	Match Score	True Legal Status	Purge Notice Disposition

Why Cross-Database Purge Matches Yield High Error Rates

Immigration databases (such as DHS SAVE or legacy USCIS naturalization records) are built for benefits administration, not voter qualification. Naturalization records often take 12 to 24 months to sync across Department of Public Safety (DPS/DMV) licensing registries. A citizen registered legally after naturalization still triggers matches against outdated immigrant visa records.

NVRA Procedural Protections

Under the National Voter Registration Act of 1993, states must maintain clean voter lists while ensuring no eligible citizen is disenfranchised. Case law (e.g., League of Women Voters v. Flores) holds that using unverified database matches with high false-positive rates to initiate summary purge letters violates federal due process and voting rights statutes.