The Scott Lifetime Warranty applies only to the original owner and must be registered within 30 days of purchase.
In the example below, the Series is "F Series" (FS), the Length is 6' 6" (66), the Line Weight is "3" (3), and it is "4 Pieces" (/4). So, the Model is "FS 663/4".
If that's at all confusing, just go ahead and give us the Series, Length, Line, and Number of Pieces... and of course, the Serial Number.
The Serial Number is written on the blank, opposite the Series and Model as shown below.