If the testimony of a subscribing witness is required by statute to authenticate a writing and the subscribing witness denies or does not recollect the execution of the writing, the writing may be authenticated by other evidence.
Cal. Evid. Code § 1412
Means of Authenticating and Proving Writings
Enacted by Stats. 1965, Ch. 299.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.