The document discusses which types of contracts require notarization according to law and the purpose of notary public verification. Specifically, it states that real estate deeds and documents like adoption papers, wills, and medical forms typically must be notarized. A notary public is licensed to acknowledge signatures and review identification to validate signings. While private contracts and some court documents usually don't require notarization, the overall goal is to authenticate signatures to avoid legal issues from denied signatures. Notarization provides an inexpensive way to ensure document authenticity and most notaries are bonded in case of mistakes.