These are the Official Mail and E-mail addresses for Daniel:
Daniel Radcliffe
c/o Harry Potter and the Chamber of Secrets
Productions
Leavesden Studios
P.O. Box 3000
Leavesden
Hertfordshire WD25 7LT
England
Daniel Radcliffe
c/o Warner Brothers Productions Ltd.
Warner Suite
Pinewood Studios
Iver Heath
Buckinghamshire SLO ONH
England