It is really frustrating. The following is copied from the CIC website
"For U.S. citizens and permanent residents only: you may apply to an FBI-approved channeler (a third party that helps deliver your information to the FBI). They will collect your application form, fingerprints, any fee(s), and give them to the FBI.
Once the FBI completes their background check, they will send the results to the channeler. The channeler will then give you your record check letter.
Please include the FBI letter with your application, and send us the complete package."
It does mention that you need to send the FBI letter and a "complete package". I am not sure what this means, but can you think of anything else that makes up this "Complete package"?