A notice of infringement has no force in and of itself. It's just a notice. Anyone can send out. Anyone could send one before the DMCA existed as well.
What the DMCA creates is protection from liability for infringement carried out by a user of your internet service if you take down the material in response to a notice. It's this protection, afforded by the US law, against lawsuits in US court, that a US recipient would want... regardless of who sent the notice.
What the DMCA creates is protection from liability for infringement carried out by a user of your internet service if you take down the material in response to a notice. It's this protection, afforded by the US law, against lawsuits in US court, that a US recipient would want... regardless of who sent the notice.