The burden is on the person making the claim, not the person refuting it.
So the person reading the claim has the right to request proof before believing it, and they have the right to ignore the claim if proof isn’t provided, as well as the right not to engage with the claimant at all.
So the person reading the claim has the right to request proof before believing it, and they have the right to ignore the claim if proof isn’t provided, as well as the right not to engage with the claimant at all.