Yes, all documents should be provided when applying. If any original document is not available, you can at least provide a copy of it until you bring in the original ones.
If the final certificate was not issued during the admission period, you should provide an official statement from your University stating that you have successfully finished your courses and obtained your degree.
If your application was accepted, yet some of your documents were copies, then you have to provide all the original ones so you can register your courses.