Legalization in the US (The apostille)
Belgian consuls do not legalize official US documents for use in Belgium.
Belgium and the United States, together with other countries, have signed the Convention of the Hague of 1961. This Convention introduces a simplified “apostille” procedure, replacing the more cumbersome legalization. Official documents issued by one member state of this Convention, need but a single authentication “stamp”, the apostille to become valid for use in another member state.
In the United States, the apostille is issued by the Secretary of State of the state where the document was issued.
You can find a list of the designated competent authority per state by clicking here.