Watermarked ballots

I've read online claims that the ballots have watermarks, while others have disputed this and claimed the ballots don't have watermarks.

Here's what the Cybersecurity & Infrastructure Security Agency have to say on the subject of watermarked ballots:

"Some ballots have watermarks indicating that the ballot is authentic. Watermarks are specific to each election and confirm the ballot was printed by an approved printing authority."

The statement confirms that watermarks can be used to confirm ballots have been printed by an approved printing authority. It also confirms that watermarked ballots are used in some elections, but it doesn't provide a definitive clarification with specific regard to the Presidential election. 

The above statement was taken from the CISA pdf entitled 'Mail-In Voting: Election Integrity Safeguards': 
https://www.cisa.gov/sites/default/files/publications/mail-in-voting-election-integrity-safeguards_508.pdf

A copy is produced below: