California Certificate of Acknowledgement is a document which is signed by a notary public or other authority in the presence of two witnesses, and certifies that the facts stated in a document are true, valid and correct. It can be used to verify the identity of signatories to legal documents and agreements, or to confirm the accuracy of documents such as deeds, wills, trusts, powers of attorney, affidavits, leases and other official items. The certificate is endorsed by the notary public and the state seal is usually affixed to it. It is a seal of authority, which means that it provides a measure of protection against fraud and tampering. The Certificate of Acknowledgement is notarized in California and is accepted by the federal and state governments. In some cases, it can be used to provide evidence in court.