Peculiar infinitive

Dark Fury It's just me or this sentence is confusing? Is it just me or is this sentence confusing?

Note above how to form your question. Be sure to use subject-verb inversion for questions.
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It's not just you. It is, as you say, a peculiar infinitive.

CJ

Thank you for the corrections. Awful mistakes, I'll do my best to avoid the likes in the future.

Back to the subject, does the infinitive-part make any sense in relation to the rest?

Dark Furydoes the infinitive-part make any sense in relation to the rest?

I imagine it means "if you know the person whose name should go in the blank", whatever that means in the context of this Death Note movie.

CJ

OK, I see your way of seeing this. You think the infinitive belongs to his/her name.
The idea behind the text is something like this: If someone who doesn't possess the Death Note, and knows the face and name of the person puts down the name in the blank, the effect will be the same.
Hope my explanation is not even more confusing