CFA Institute provides prospective CFA candidates with a couple registration options.
1) Online registration: This is the quickest and easiest method to register as CFA Institute receives your registration immediately. All you need to do is create an online user account and register for the exam. Online registration is also cheaper as you avoid the costs associated with sending your information through the mail.
2) Registration form: This form is sent to CFA Institute by prospective CFA candidates through the mail. CFA Institute recommends these registration forms to be sent via courier to ensure the package can be tracked if not received.
For more information on the registration procedure and requirements, click here.
(For related reading, see: Pass Your CFA Exams on the First Try.)