And what the hell do they expect you to do with this?
It's not addressed to you so you cannot do anything in your name. Did your lease company include a covering letter?
Unless the lease company authorised you to act on their behalf then you cannot do anything with the NTO. Even if they did, all you could would be to make reps on their behalf with their neck still in the noose.
Do they know this?
Did you?
They should transfer liability by completing the vehicle hire company - vehicle on hire grounds. If they've authorised you to act for them then, odd as it might seem, you could submit the reps on the vehicle hire company grounds but you MUST include the necessary documents.