Is the biometric data used in voter identification at polling stations?

Nigeria, INEC, Regulations and Guidelines for the Conduct of Elections, accessed 3 February 2019

10. (a) In accordance with Section 49 (2) of the Electoral Act, a person intending to vote shall be verified to be the same person on the Register of Voters by use of the Smart Card Reader (SCR) in the manner prescribed in these Regulations and Guidelines. […]

(d) The accreditation process shall comprise reading of the Permanent Voter’s Card (PVC) and authentication of the voter’s fingerprint using the SCR; checking of the Register of Voters and inking of the cuticle of the specified finger of the voter.