The email just said to submit my passport for the COPR. Since Indian passport holders have to submit their physical passports, I am not sure if I have to go and physically deposit it by taking an appointment/no appointment needed, or if I need to do the same via CVAC official courier service. The email didn't clarify these points.
Thanks for clarifying about the RPRF.
I spoke to a few people and they mentioned that RPRF and Biometrics do not have to be paid/done again.
Still confused about the entire process of passport submission.
I don't know what is in your letter but mine had this "To submit your package outside of Canada: Please submit your package to the nearest Visa Application Centre along with the VAC Passport Transmission fee". There is a VAC office in my state so I mailed it it to them. They forwarded my docs on to IRCC via VFS
Call your nearest CVAC and ask them