Nigeria’s Independent National Electoral Commission (INEC) now has a web portal where you can do any of the following:
(A). NEW VOTERS CAN
Pre-Register online for their Voter’s Card.
(B). REGISTERED VOTERS CAN
i. Review their Voter’s Registration.
ii. Request to Update their Information.
iii. Transfer their Voter Registration to another Polling Unit.

HOW TO DO ANY OF THE ABOVE?
1. Go to https://cvr.inecnigeria.org
2. Click on “Sign In/Register” at the top right section.
3. Either sign in using the left section (if previously registered) or fill the “New Portal User” section on the right.
4. Follow the subsequent instructions to pre-register for your Voter’s Card or to update your Voter’s info.

SOURCE
http://www.inecnigeria.org