Any claim for non-compliance or obvious defect in the product delivered should be lodged by registered letter without delay and no later than 48 hours after delivery, on pain of risking non-compliance with the time frames. Claims of another nature should be made within eight days at the same conditions. The burden of proof for a claim rests with the client. In the above cases, the due date is the reference date for collection. Any dispute of our invoices should be submitted by registered letter within eight days of the invoice date.