It is the duty of notaries: 1/ to draw up the acts and instruments regarding decrees, dispositions, obligations, or other things which require their action; 2/ to record faithfully in writing what has taken place and to sign it with a notation of the place, day, month, and year; 3/ having observed what is required, to furnish acts or instruments to one who legitimately requests them from the records and to declare copies of them to be in conformity with the original.
Source: Code of Canon Law (Vatican.va)