
What is the difference
between legalization and apostille?

Legalizing (also called attestation) a document is something only a non-Hague convention member foreign consulate or embassy can issue on a legal document that is presented to them.
Apostilling a document is something only a U.S secretary of state or the U.S Department of State can issue on a legal document presented to them for a country that is a part of the 1961 Hague Convention Treaty.