The signer's brother, who is named as a beneficiary in the document, offers to act as credible witness. What applies?

A credible witness substitutes their sworn word for documentary identification, so the witness's disinterest is the entire safeguard. California requires the credible witness to swear that they have no financial interest in the document and are not named in it, and a brother named as a beneficiary fails both tests outright. The disqualification is categorical rather than a matter of degree: it does not depend on how much he stands to receive, whether the interest is contingent, or whether he would inherit outright or through some other mechanism. Nor can a second witness cure it, since adding a witness does not remove the first one's interest. And familiarity, which the distractor offers as a virtue, is beside the point — the credible witness route already requires personal knowledge of the signer, so knowing them well is a precondition rather than a qualification. The remedy is to find a disinterested credible witness or to use qualifying identification documents.

A credible witness must have no financial interest in the document and must not be named in it, and a brother named as a beneficiary fails both requirements.

California requires a credible witness to swear that the signer is the person named, that the witness personally knows the signer, that the signer cannot easily obtain other identification, that the signer has no acceptable identification documents, and that the witness has no financial interest in and is not named in the document.

No Stake, No Name. A credible witness with something to gain is not credible.

The same disinterest principle disqualifies an interpreter named in the document. Interest defeats the role wherever it appears.

• •Treating familiarity with the signer as qualifying
• •Adding a second witness to cure the first one's interest
• •Distinguishing contingent from outright interests