Need Help - 1st time selling out of state car in CA

Hello,

I just recently moved to CA and I am currently in the process of selling my car to a private seller. I have yet to have my car registered but from speaking with the private seller, he spoke with his credit union and they informed me that before I can sell my car I will need to get it registered.

I have done some research but I have been unable to find information on if I can sell my car without registering in CA.

Can I sell my car to the person without registering it in CA?

Thank you,