The following payments are possible:

Wire Transfers:

Bank address: Rabobank The Netherlands, Bezuidenhoutseweg 5, 2594 AB THE HAGUE.
Account number: 3871.82.802
IBAN  / ABA / BIC: NL77RABO0387182802,
Swift number: RaboNL2U,
Bank code: 1299

Credit Cards: 

We accept American Express, Master Card and Visa. Service charge 3.5%. 
Click here for the Credit Card Autorization Form.

Checks:

Checks in USD only and payable to Mr. E. Groeneweg can be brought to your nearest Wells Fargo Bank.
Account number: 1010126838022

You can also send the check with "Overnight Express Mail" to:
Wells Fargo Bank, 2701 North West Vaughn St. 5th Fl, Portland OR, 97210, USA.
Important Note: write on the check "please deposit into account 1010126838022".

Important note for payment by US$ checks.
Please us the daily exchange rate when you write the check and take / mail it immediately to Wells Fargo.