I don't know. If I am uncertain when I am doing a story, I make sure to use words to indicate doubt (alleged, rumor, according to the source, etc.)
Most good news sites do the same.
You take a chance at times. Someone might be pulling your strings, or someone might be slipping you real news on the quiet.
Even with this, we're TOLD it was false, but that could be disinformation too, you know? Or not.
Some places have a reputation for not being reliable. Those who regularly read the news anywhere learn who is legitimate and who might not be.