How to submit the official transcript on the dental application?

I have read this on adea website: You will need to submit the following documents: Official transcripts from every postsecondary institution attended.* Letters of evaluation.* How can I submit my official transcripts? Do I need to go to my school and request that they send it to adea or should I order them online and send it by email or fax?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums