Yes for Royal Mail Tracked orders you can.  If you will not be in to receive your order, you can specify a Safeplace (in less than 30 characters) in the Order Notes box at Checkout. Any orders left in a Safeplace are left at your own risk; if the goods are lost they will not be replaced. This service is not available on Royal Mail  Special or Saturday Deliveries,  or Delivery by Courier.