Information about payment by invoice
In the registration form, under the 'payment' tab (under the data you have entered), click the tick box 'specify billing address'. Enter all the information that is required on the invoice here. Then press the green 'pay' button. You can now choose the 'Bank transfer' option. Enter the e-mail address to which the payment link should be sent. This e-mail also states when you must have made the payment in order to receive the bib numbers.