[ryani]

The "under penalty of perjury" is completely toothless and I don't believe has ever resulted in a judgement against a rightsholder.

Here is the exact text from the DMCA from https://www.aclu.org/other/text-digital-millennium-copyright...

(vi) A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly in-fringed.

Note the particular phrasing. The requirement that the information in the notification be accurate is not under penalty of perjury. The only thing that is under penalty of perjury is that you can only DMCA claim things that you have copyright to (or are a lawyer representing that entity).

And it's worse than that, because you can claim something that is totally unrelated without this penalty as long as you own the copyright you claim to be enforcing.