In many states, a notary is required to witness the signing of the mortgage documents, including the loan application, promissory note, and mortgage or deed of trust. This helps to prevent fraud and ensure the legality of the documents. The notary acts as an impartial witness, verifying the identity of the parties involved and confirming that they have signed the documents voluntarily and under their own free will. Notaries also certify that all signatures and seals on the documents are genuine. Additionally, a notary may also assist with loan closing procedures, including the authentication of signatures on closing documents and the administration of oaths and affirmations.