Always the first place to look:
Hunting - Hunting, Bowhunting, Hunters, Bowhunters
Wolverine is right on the moola.
Other contact info (just in case this is not up to date and you have to call to get the new fax number):
Application forms are available from the Dutch customs authorities via the following address:
Belastingdienst, Douane Groningen, Centrale dienst voor in- en uitvoer Kempkensberg 12
P. O. Box 30003
9700 RD GRONINGEN
Tel: 0031 88 1512122
Fax: 0031 88 1513182
Opening hours:
Monday to Thursday: from 8.00 am to 8.00 pm
Friday: from 8.00 am to 5.00 pm
Please fax the completed forms and a copy of your passport to the fax number indicated above. The Dutch customs authorities will return the forms together with a licence and will inform the customs authorities and security department at Schiphol of the transport. This process will take three to five working days.
During the trip, you will be required to have the relevant licence forms with you and to produce them when asked to do so. If you do not have the licences required with you, your firearms and ammunition could be confiscated.
Here is the jpeg of the form:
View attachment 10490