How is Renunciation Certificate different from Surrender Certificate ?

[jvenkatrao]

I have renounced my Indian citizenship after acquiring US citizenship. I want to know if I need to get Surrender Certificate ? How can I apply for that ? I don't see any link on ckgs site to apply for surrender certificate ?
Where do I see the link if any to surrender certificate ?

I also want to apply for OCI card ? Can I apply for OCI and surrender certificate together ? Do I need to submit my original passport to apply for OCI card ? How long does OCI processing takes ?