A similar issue arises with sending the 'claimed' message to a Thing that has been claimed (example 22). In this case: what happens when a Thing is not on-line when it is claimed and that message is not delivered? How does this work if there is no friendship relation between a registry and a thing? Does the registry keep sending the 'claimed' message until it receives a response? Or should there always be a friendship relation between a registry and a thing? If this is the case it should be stated explicitly in the XEP-0347. Cheers, Eelco This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages.