--->Act of Valor Trailer<---Watch this trailer (About 4 mins). After, it asks you to login to Origin. After that, it gives you a code for the dog tags.
You must be in the US of Canada. If you are outside, follow these instructions first...
•Go to
http://profile.ea.com/ (if link doesn't work it's profile.ea.com), sign in and click 'update my info', and change your country to the United States or Canada.
•Watch the trailer at
http://actofvalor.com/bf3/ to the end, and follow the rest of the instructions.
Subject: Free Dog Tags 
It's monday. Had a bad weekend and the brain isn't working yet. (Never really is) Plus I copied that part from another forum! Northern US is US of C! LOL