At the recent Six-State Virtual Conference, there was a Q&A Session from GPO at http://www.opal-online.org/6state20100813QA/. At 60:30, Joe McClane, Manager of Content Acquisitions for GPO, asked people making lost documents/document discovery reports to include as much information as they have on the document. The more the better.
It’s especially important that you give GPO an OCLC number if you have it as this can save GPO staff days of searching. Many of the reports we receive here at the Lost Docs blog seem to come with OCLC numbers, but an extra reminder doesn’t seem out of order.