A method, apparatus, and computer instructions for transferring a unique digital item between a first party and a destination party in a network data processing system. A request to transfer a unique digital item in an account of the first party is received. Responsive to receiving the request, a retrieval tag is associated with the unique digital item. The retrieval tag is generated by a server process, such as one on which the unique digital item is located. The unique digital item is transferred from the source account to a temporary storage account in association with the retrieval tag. The unique digital item is listed on a trusted third-party server. A second party may inspect the unique digital item and agree to exchange something in return for the first party's listed unique digital item. The transfer occurs after all parties have committed to the transaction. Responsive to a redemption request initiated by the trusted third-party, the unique digital item is transferred from the temporary storage account to an account of the second party.