Did not happen. The states are responsible for getting their ballots printed - not the federal government.
“The states are responsible for getting their ballots printed - not the federal government.”
This is irrelevant. All the time, law enforcement works with private corporations in sting operations. If DHS wanted to get watermarks placed on any of these ballots they very easily could have done it.
NYT and NPR ran story early in the year about states farming out mail-in ballot generation to speciality print shops.
https://www.nytimes.com/interactive/2020/10/26/magazine/printing-mail-in-ballots.html
But do the states have to use only the watermarked blank paper supplied by the DHS?