Biometric voter registration without verification leaves certain electoral risks (ballot stuffing, ballot destruction) unmitigated.
It looks like Ghana is aware of those risks and has seen fit to implement a biometric voting system that covers both ends of the electoral process.
EC to test biometric verification devices Nov. 3 and 4 (Modern Ghana)
Before ballot papers are issued to voters, their identities will first be verified “biometrically”. Thumbprints of voters will be captured by the verification devices and cross-checked against prints collected during the biometric registration exercise.
This is to establish whether a voter has indeed been captured on the voters’ register. Apart from the introduction of the verification device, the EC says it will also make use of the name reference list which indicates specific locations of voters on the register eliminating the task of flipping through the entire register to find a voter.
A post covering some of the nuts and bolts of why registration without verification could be inadequate is here. The issues are discussed within the Ghanaian context but they apply far more broadly.