Oklahoma Party Competent as Witness is a type of legal testimony where an individual is formally recognized by the court to be a competent witness. This legal testimony is often used in civil and criminal cases in Oklahoma. The individual must be a resident of Oklahoma for at least six months and must be able to understand the legal testimony. Oklahoma Party Competent as Witness can be used to testify to matters of fact, provide an expert opinion, or even to authenticate documents. The types of Oklahoma Party Competent as Witness are Expert Witness, Lay Witness, and Documentary Witness. Expert Witnesses are those that have specialized knowledge or experience in a certain subject and can provide an expert opinion. Lay Witnesses are individuals with direct knowledge of the facts at hand and can testify to matters of fact. Documentary Witnesses are those that can authenticate documents by confirming the proper execution of the documents or by identifying a signature on the document.