Any preliminary engineering work (as part of intra-company sessions) and training sessions may be invoiced separately. The invoice will be made out in euros excluding VAT and will be used as a simplified contract. Any training ordered will be due. Invoices are payable within 45 days of the end of the month on the invoice date, net and without discount, by bank transfer or by cheque payable to Astrakhan. In the event of late payment on the due date, the sums remaining due shall automatically and without the need for a formal notice bear interest at a rate of 2% per month, without this clause affecting the due date of the debt. As the invoices issued correspond to services rendered, no discount for cash payment can be deducted. Astrakhan reserves the right to suspend any current and/or future training in the event of previous late payments.