there is lots of info on this, but anyways....
When you get to your CFRC det., you'll be called into an office where you will be asked if anything in regards to the status of your application has changed. If you have taken on any more debt, been criminally charged, had any medical problems since your last processing, etc.
After you sign off you will then be handed a file with your information, service number, job offer details, degree/diploma/certificates, addresses, marital status. You'll look these over line by line and sign off or make changes if needed. The information is very specific to your own job offer, if you see anything that you were unaware of or unadvised about ASK(there was a recruit yesterday who had to clarify where his posting would be, and it turned out the he had uncovered a mistake on his file that needed to be fixed....and was immediately).
Also, you will sign a contract, a will, name beneficiaries. You will be given travel expense forms, perhaps a leave with out pay document if there is any time between then and your BMQ. You'll go over your oath or affirmation. you may also be asked to present your security clearance forms that you got with your joining instructions.
Finally you will be sworn in by way of either an oath using a bible, or solemn affirmation...you will face the queen then turn and face the audience or witnesses. You'll get a document describing the CF values and a document declaring you a member of the Forces. at the end you'll stand for the national anthem.
Hope that helps to set your expectations.
