You can pay via invoice if you order from us via our webshop. Just select the payment method "invoice" at checkout. Don't forget to let us know your billing address or we will send your invoice with your order. The invoice is payable 30 days after invoice date. In our webshop, payment is also possible via paypal or credit card. If you order by Purchase Order or Email, invoice and payment through wire transfer is the only possible payment option.