Lifetime is on your account/service number that the Tivo is linked to. Just run cleR & delete everything.
Series 2 (80 hrs,PLS, Pending sale)
TiVo HD 1TB (157 HD Hrs, PLS, "S3HD")
Roamio, Oh Roamio!
The TiVo Apocalypse begins on Sat 2013 Feb 16 00:00 GMT!