A A separate and distinct provision in a legal document. in a A legal document which expresses a person’s final wishes about what happens to their property after they pass away, often specifically identifying intended beneficiaries for specific items of property. which is signed by disinterested witnesses under penalty of perjury, which swears that all statutory requirements for validly executing the willhave been satisfied. This clause often appears just below the testator’s signature on the will. In California, a will with an attestation clause is considered “self-proving”.