BVAS — Nigeria's Biometric Voter Accreditation, Judged by Its Own Election Observers

Nigeria's Independent National Electoral Commission (INEC) introduced the Bimodal Voter Accreditation System (BVAS) — a handheld device that matches a voter's fingerprint or face against the register — as an upgrade to the earlier card-reader system, deploying it nationwide for the February-March 2023 general elections covering 93.4 million registered voters.

Independent domestic observation gives BVAS a broadly positive but incomplete record. Yiaga Africa's 'Watching the Vote' parallel vote tabulation, based on reports from 1,358 of 1,507 sampled polling units, found BVAS was used throughout accreditation in 99% of sampled units and 'functioned properly' in about 88% of them, while it malfunctioned and was fixed in 9% of units and malfunctioned and was replaced in a further 2%.

The European Union Election Observation Mission recorded a higher failure rate on presidential election day, finding BVAS was not functioning properly in 25 of 240 observed polling units (about 10.4%), concentrated in specific states, though it reported markedly fewer problems in the state-level elections held three weeks later after INEC introduced corrective measures. The Commonwealth Observer Group likewise cited 'significant shortcomings,' attributing them to inadequate pre-election testing and limited polling-staff training, on top of separate failures in INEC's real-time results-upload portal (IReV) that further damaged public trust even where BVAS itself worked.

BVAS improved on Nigeria's previous accreditation technology and left an auditable biometric log that later fed post-election legal challenges, but neither Yiaga Africa's sample nor the EU mission's report translates into a single authoritative national failure rate, and no rigorous independent study isolates BVAS's net effect on fraud or turnout. The practice is best read as a large-scale, partially evidenced deployment with real, documented operational gaps rather than a proven success story.

Read the full analysis: https://yiaga.org/yiaga-africa-watching-the-vote-pvt-2023-presidential-election-preliminary-press-statement/