633.279  Signed and witnessed.
  1.  Formal execution.  All wills and codicils, except as provided in section 633.283, to be valid, must be in writing, signed by the testator, or by some person in the testator’s presence and by the testator’s express direction writing the testator’s name thereto, and declared by the testator to be the testator’s will, and witnessed, at the testator’s request, by two competent persons who signed as witnesses in the presence of the testator and in the presence of each other; provided, however, that the validity of the execution of any will or instrument which was executed prior to January 1, 1964, shall be determined by the law in effect immediately prior to said date.
  2.  Self-proved will.
  a.  An attested will may be made self-proved at the time of its execution, or at any subsequent date, by the acknowledgment thereof by the testator and the affidavits of the witnesses, each made before a person authorized to administer oaths and take acknowledgments under the laws of this state, and evidenced by such person’s certificate, under seal, attached or annexed to the will, in form and content substantially as follows:
Affidavit
State of........................            )

County of........................            )  ss

  We, the undersigned, ............................, ............................ and ...................................., the testator and the witnesses, respectively, whose names are signed to the attached or foregoing instrument, being first duly sworn, declare to the undersigned authority that at the date of the instrument, we all knew the identity of each other; the instrument was exhibited to the witnesses by the testator, who declared it to be the testator’s last will and testament and was signed by the testator or by another at the direction of the testator at ................................, in the County of ........................, State of ........................, on the date shown in the instrument, and in the presence of each other as subscribing witnesses; that we, as witnesses, declare to the undersigned authority that in our presence the testator executed and acknowledged such will as the testator’s will and that we, in the testator’s presence, at the testator’s request, and in the presence of each other, did subscribe our names thereto as attesting witnesses on the date of such will; and that the witnesses were sixteen years of age or older.

............................

Testator

............................

Witness

............................

Witness

............................

  Subscribed, sworn and acknowledged before me by ................................, the testator; and subscribed and sworn before me by ................................ and ............................, witnesses, this ............ day of ........................ (month), ............ (year)

          .............................

          Notary Public, or other notarial

          officer authorized to take

(Stamp)          and certify acknowledgments

          and administer oaths
  b.  A self-proved will shall constitute proof of due execution of such instrument as required by section 633.293 and may be admitted to probate without testimony of witnesses.
[C51, §1281; R60, §2313; C73, §2326; C97, §3274; C24, 27, 31, 35, 39, §11852; C46, 50, 54, 58, 62, §633.7; C66, 71, 73, 75, 77, 79, 81, §633.279]
2000 Acts, ch 1058, §56; 2011 Acts, ch 25, §73; 2012 Acts, ch 1050, §57, 60; 2013 Acts, ch 33, §2, 9

2013 amendment to subsection 2, paragraph a, applies to estates of decedents dying on or after July 1, 2013; 2013 Acts, ch 33, §9