If you require a Visa letter to travel to The Netherlands, please register and pay for your entry ticket. After doing so, you will be sent a confirmation email which contains a link to download your pre-filled Visa letter. Should you have any issues with this, please email firstname.lastname@example.org
Please click here to see if you need a Visa letter to travel to The Netherlands: https://bit.ly/2UWurgF
Please note, the decision to deliver visas remains the sole responsibility of the Holland representation in your country. Should their decision be negative, we will not be in a position to intervene.
Employees from outside the European Union
An employment permit (tewerkstellingsvergunning) is required for non-EU residents. Such persons will not be admitted by RAI Amsterdam without a valid permit.
And there is this website explaining the different work permits and also there is an article on Brexit but it is more related to British Nationals living in the Netherlands.