Since Belarus is a party to the Hague Convention, thus, all that is required to have your documents legalized for use in Belarus is an Apostille.
Each state has a different agency that issues the Apostille in New York the Apostille is issued by the Secretary of State. In other states such as New Jersey, the Apostille is issued by the Department of the Treasury, Division of Revenue, in Florida, the Apostille are issued by the Secretary of State.
If your document is of a commercial nature such as a Certificate of Origin, Commercial Invoice, Packing Slip you may still have to visit the embassy or consular office for their stamp.
There are many other countries that accept the Apostille as an acceptable document for international legalization. So there is no need to visit the Belarus embassy or consular office.
If you need an affordable Apostille for Belarus, you can call or visit the following services:
Notary & Apostille Service