An Alaska Offer of Proof–Witness is a legal document filed in Alaska courts that outlines a witness's expected testimony. It includes the witness's name, brief description of their expected testimony, and any documents that the witness will be providing as evidence. There are two types of Alaska Offer of Proof–Witnesses: Expert Witnesses and Fact Witnesses. Expert Witnesses are those who have specialized knowledge in a given field, such as medicine or engineering, and can provide testimony on a particular issue or topic. Fact Witnesses are those who have direct knowledge or personal experience of the events in question, and can provide firsthand accounts of the events.