[From http://www.ibo.org/ibna/parents_students/dpstudents.cfm#s]
Students who have completed IB examinations are encouraged (and often required) to request that a special IB transcript of their results be sent to the North American college or university they plan to attend. Their Diploma Programme coordinator should file a request on their behalf while they are still high school students. Transcripts requested by current IB students in this way are free.
After they leave the secondary school or high school, students may also write directly to the North American office of the IBO in New York and request a transcript of results. The letter should include the student’s name, IB student code number, the IB high school they attended, the year(s) in which examinations were taken, and where the transcript should be sent. A fee is charged for transcripts requested in this way. For more information about transcript requests, please call the IBNA office in New York City at +1-212-696-4464, or send an e-mail to transcripts.ibna@ibo.org.