(I am not an attorney.) the judgement against the defendant accused of libel or slander:
"To prove prima facie defamation, a plaintiff must show four things: 1) a false statement purporting to be fact; 2) publication or communication of that statement to a third person; 3) fault amounting to at least negligence; and 4) damages, or some harm caused to the person or entity who is the subject of the statement."
A suit can be brought against someone with less, but it is PROOF provided by plaintiff that requires all the above, to get any award. But again, TRUTH is the ultimate defense against any claim of libel or slander, in the US.