Does a CERTIFICATE OF AUTHORSHIP need to be notarized?

As set forth in the article by Independent Producers, found here, “A Certificate of Authorship is a key document in the chain of title of a motion picture. This is a notarized statement by the writer identifying the author of the script. In the case of a work made for hire, the script’s author is considered to be the production company. A certificate should be executed by all of the script’s authors.”

More information here. (Certificate of Authorship, Last Updated on Wed. April 20th, 2016)