5. Invoicing and payment

5.1 The contractual partner's invoices are to be written and sent to us in duplicate on completion of his delivery or acceptance of his service. In content, they must correspond with our order and contain precise, verifiable data; value-added tax must be shown separately.

5.2 In so far as no other agreement has been reached, payment will be made within 60 days net; on payments made within 14 days, we have the right to deduct 3% discount, and on payments made within 30 days, 2% discount. We may make the payment either by a bank transfer or by sending a cheque at our choice; the risks of transmission of the payment sum are borne by the contractual partner. The time limits for payments and discounts are considered complied with if the bank transfer order or cheque were sent punctually.

5.3 The time limits for payments and discounts start with receipt of the contractual partner's correct invoice, but not before receipt of his delivery or acceptance of his service. If our order is executed as several partial deliveries, then the time limits for payments and discounts for partial invoices sent to us only start with receipt of the last delivery and invoice. If we have the right to delay payment due to defects in the delivery or service, the time limits for discounts also run from the day on which the reason for delaying payment is eliminated.

5.4 We have the right to offset our own counterclaims, even if these are not yet due. From the point of view of justifying a discount, offsetting is the equivalent of making a payment.

5.5 A cession of claims of the contractual partner against us to a third party is only effective with our written approval.