Recent revelations about the investigative techniques employed by the Recording Industry Association of America (RIAA) to fight music piracy on the internet have raised concerns among privacy advocates. The subpoena process has led to a collision between copyright law on the one side and due process and privacy concerns on the other.

The RIAA began trying to discover the identities of more than 1,000 internet users by serving subpoenas on the users’ internet service providers, using a procedure established under the 1998 Digital Millennium Copyright Act (DMCA).