A Kansas Self-Proving Affidavit is a type of legal document used in the U.S. state of Kansas to authenticate the validity of a will. The document is signed by the testator (the person creating the will) and two witnesses in front of a notary public. The affidavit serves as proof that the will was properly executed, and when signed, eliminates the need for the witnesses to appear in court to authenticate the will. There are two types of Kansas Self-Proving Affidavits: the Standard and the Joint Self-Proving Affidavit. The Standard Self-Proving Affidavit is used when the testator signs the will in the presence of two witnesses, while the Joint Self-Proving Affidavit is used when the testator and the witnesses all sign the affidavit in front of a notary. Both types of affidavits must be signed and notarized in order to be valid.