We recommend that you apply for the Nuffic Certificate (formerly known as the NESO certificate) at least four months prior to your planned departure for the Netherlands. The average processing time is four weeks, but it may take up to two months. Keep in mind that holiday periods and national holidays may extend the processing time.
Read more at Nuffic’s website. Please note that the Nuffic certificate is not required when applying for admission to TU Delft.