A TC number looks like 'TC-ax2b3af0-15af-4bf4-83df-455c95b35bd8' and can be found on your notice.
OR
Enter Reference# From Email Notice
1. Find seven letters on the notice you received:
Note to ISP: Please forward the entire invoice
Re: Unauthorized Use of Copyrights Owned Exclusively by BMG Rights Management (US) LLC
Reference #: ABVXSDF IP Address: 192.168.0.1