A certificate issued by the appropriate office of a state government (for example, the Governor, Lt. Governor, Secretary of State, Treasurer, etc. depending on the state) for purposes of authenticating a notary's signature and official status as a notary on a particular date. An apostille may be required for a notarized document that is bound for a foreign country that participates in the 1961 Hague Convention Abolishing the Requirement of Legalization for Foreign Public Documents. Obtaining an apostille is the responsibility of the document custodian, not the notary.