4. Terms of payment
If not otherwise specified our invoices are payable net without discount. All invoices are, unless otherwise agreed, to be paid on prepayment or cash payment only. All bank transfers are to be made so that the recipient is exempt from charges. All open charges will be invoiced in a following invoice. Payments are billed first against potential costs and interest payments, then against the oldest receivable respectively. With the start of the delay or the refusal to accept the delivered goods all open accounts are payable immediately. A set-off on the customer´s side can only happen in case of an undisputed and legally binding claim. The same is valid for the assertion of the right of retention.