The Dienst Uitvoering Onderwijs (DUO) is the Dutch authority responsible for implementing various laws concerning education. Their most relevant tasks for students inlude providing student finance for higher education, administering diplomas and legalising diplomas. The first is comprised of four components; a loan, a student travel product, a supplementary grant and a tuition fee loan. You can apply for, and alter this on DUO if you have the Dutch nationality. It is necessary to log in with you DigiD.
Specific information for international students can be found here.