Final paper submission while NOT attending the conference I'm the corresponding author of my accepted paper in a conference. I won't be able to attend the conference so one of the co-authors will attend and present the paper.

Now for the final paper submission, I have to make a full registration for the system to let me upload the final version.

Should I register and upload the final paper while I know I'm not going to attend? I know that only the corresponding author can submit the final version.
Is it possible to register and then somehow transfer my submission to my co-author who will be attending or he needs to make a separate registration?
Mohammad, your co-author can attend the conference on your behalf, as he/she is also the part of that paper. However, it's better to contact the convenor/organizer of that conference. It depends upon their policies whether they allow it or not.