The date is initialized by default to the current date. You can modify this date and enter the delivery note date mentioned on the supplier delivery note attached to the goods.
When the receipt comes from an inter-site / inter-company delivery, the delivery note date is initialized by the delivery date of the inter-site / inter-company shipment and the field is no longer accessible. If two deliveries of this type have been selected, the field displays today's date and becomes available for modification.