copyright
Contacted about Copyright infringement but no contact information provided?
<p>What can you do if someone e-mails you claiming copyright infringement (i.e. that I have used some property of theirs without permission), but provide no information other than a person's name (meaning no phone, e-mail, address, nothing). How do I respond without said contact information when you know the content is yours?</p>

<p>You are probably not obligated to do so, although you could attempt to discern the person's contact information with their name which can often be trivially done.</p>
<p>This doesn't appear to meet the minimum requirements for a Digital Millennium Copyright Act takedown notice.</p>
<p>If someone alleges that your work is infringing in a later lawsuit and you lose (which shouldn't happen if it is all your own work), and the existence of the contact form is revealed, however, it could mean the difference between willful infringement, which is subject to greater sanctions in a lawsuit, and innocent infringement, which is subject to less sanctions.</p>
<p>It might just be a scam and you would probably be secure in ignoring it if you know that you are not infringing.</p>
