Notarizing refers to the process of verifying the authenticity of a document by a notary public. There are several synonyms for the word notarizing, such as certifying, attesting, and validating. These words all refer to the act of verifying the validity of a document or signature. Other synonyms for notarizing include witnessing, sealing, and signing. Each of these words conveys the idea of an authorized person certifying the validity of a legal document. Whether you say notarizing or validating, the importance of this process cannot be understated - it enables individuals to confidently conduct legal transactions.