The IND reads foreign certificates and establishes their authenticity. This is why these certificates often first have to be legalised or issued with an Apostille. When this is done, you can use them in the Netherlands. It often concerns official documents. For example, a birth certificate, an unmarried status declaration or marriage certificate.
Legalisation or an Apostille means that the document is verified to see whether it is issued by the (authorised) person or institution. Whether the document is correctly signed is also checked.
You can get your documents apostilled at DIRCO.