If the fiber is secret, nobody's going to tell you where it's at, and nobody's going to 'fess up about the ownership of said fiber. Correct, that's why the serious men who pull up to the site and get busy fixing it don't tell you who they are.
And who do you make the check out to when you do cut it? The serious men will not ask for payment
Or would a 'Hey, how the hell can we know when we cut a top secret fiber? Rule #1 of accidentally cutting "black" fiber: Do not talk smack to the serious men.
How we supposed to know it's there if it's top secret and we don't have clearance??? See Rule #1.
defense work in court when the other guy's lawyers come at you for damages?There will be nothing to go to court about.