Legal analysis: Notarization of witness testimony is actually a way to preserve witness testimony, which is notarized and recorded. Notarize witness statements given by witnesses. Notarization takes the following three methods: (1) Questions and answers between the notary and the witness; (2) Lawyer’s investigation transcript; (3) Witness’s statement.

Legal basis: "Notarization Law of the People's Republic of China" Article 27 The parties applying for notarization shall truthfully explain to the notary agency the relevant circumstances of the matters applying for notarization, and provide true, legal, and Sufficient supporting materials; if the supporting materials provided are insufficient, the notary agency may request supplementary materials.