A notary public of the common law is a public officer constituted by law to serve the public in non-contentious matters usually concerned with general financial transactions, estates, deeds, powers-of-attorney, and foreign and international business. A notary's main functions are to validate the signature of a person ; administer oaths and affirmations; take affidavits and statutory declarations, including from witnesses; authenticate the execution of certain classes of documents; take acknowledgments ; provide notice of foreign drafts; provide exemplifications and notarial copies; and, to perform certain other official acts depending on the jurisdiction. Such transactions are known as notarial acts, or more commonly, notarizations. The term notary public only refers to common-law notaries and should not be confused with civil-law notaries.