Wills (2023): Oral will + Attestation clause + Residuary estate + Incorporation by reference

An oral will (or nuncupative will) is a will that has been delivered orally (that is, in speech) to witnesses, as opposed to the usual form of wills, which is written and according to a proper format.

A minority of U.S. states (approximately 20 as of 2009), permit nuncupative wills under certain circumstances. Under most statutes, such wills can only be made during a person's "last sickness," must be witnessed by at least three persons, and reduced to writing by the witnesses within a specified amount of time after the testator's death. Some states also place limits on the types and value of property that can be bequeathed in this manner. A few U.S. states permit nuncupative wills made by military personnel on active duty. Under the law in England and Wales oral wills are permitted to military personnel and merchant seamen on duty (see law report below) and it is common practice in Commonwealth countries.

An analogy can be drawn to the concept of last donations (donatio mortis causa) established by Roman law and still in effect in England and Wales.

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Attestation clause.

In the statutory law of wills and trusts, an attestation clause is a clause that is typically appended to a will, often just below the place of the testator's signature.

United States.

In the United States, attestation clauses were introduced into probate law with the promulgation of the first version of the Model Probate Code in the 1940s. Statutes that authorize self-proved wills typically provide that a will that contains this language will be admitted to probate without affidavits from the attesting witnesses.

An attestation clause modeled on the Model Probate Code's language might provide:

We, the undersigned testator and the undersigned witnesses, respectively, whose names are signed to the attached or foregoing instrument declare:

(1) that the testator executed the instrument as the testator's will;

(2) that, in the presence of both witnesses, the testator signed or acknowledged the signature already made or directed another to sign for the testator in the testator's presence;

(3) that the testator executed the will as a free and voluntary act for the purposes expressed in it;

(4) that each of the witnesses, in the presence of the testator and of each other, signed the will as a witness;

(5) that the testator was of sound mind when the will was executed; and

(6) that to the best knowledge of each of the witnesses the testator was, at the time the will was executed, at least eighteen (18) years of age or was a member of the armed forces or of the merchant marine of the United States or its allies.

The validity and form of an attestation clause is usually a matter of U.S. state law, and will vary from state to state. Many states allow attestation clauses to be added as codicils to wills that were originally drafted without them.