http://www.nintendo.com/consumer/jacket/jacketrequest.jsp
It tells you everything in the link above.
What do I have to provide:
Serial Number
Number of Wii Remote Jackets requested
Name/Address
Phone
E-mail
Confirm e-mail
Opt in box
Terms and Conditions box
FYI: USA and Canada. Serial number is required. Latin Amercican users can get their remote jackets from your local retailer where Nintendo products are sold. See website for details.
My Wii Wii got it's protection last week. :)))