This page details the functionality related to the modification of collection assets.

...

A trackable collection once published cannot be deleted.

Adding certificate

Adding a certificate to a trackable collection doe not happen during the creation of the collection and hence not part of the sourcing flow. The option of specifying when to issue a certificate should be part of adding certificate and not part of creation flow.

Non-trackable Collections

Digital Textbooks, Playlists are typically non-trackable collections.

Linking asset to a collection

...