Hi, Thank you for your question and welcome. My name is ***** ***** I will assist you. Technically yes you could charge him the delivery costs for agreeing to exchange the goods. The only issue is he made the purchase online and accordingly he is entitled to return the goods under the cooling off period of 14 days - the caveat to this is if he exercises this right he will have to arrange for the goods to be returned to you. At this point technically the delivery of the new bed is no longer an exchange but a new purchase, so you would be able to charge him a delivery charge if this was a term of the purchase. Is the customer disputing the delivery charges?