The NUS extra website has a Frequently Asked Questions section regarding NUS extra cards. However, if that does not answer your question you can contact NUS by email firstname.lastname@example.org or ring them on 01625 413277.
Bradford College Students' Union
Reception: 01274 43 3007
Registered Office: G13 David Hockney Building, Great Horton Road, Bradford, West Yorkshire, BD7 1AY
A registered Charity in England and Wales number: 1167905