Methods and systems are described for processing a non-returnable command response based on a markup element. In one aspect, a resource is sent to a user agent includes a no-return markup element. A request message is received identifying a command and including no-return-request information based on the resource. The command is processed and no command response is sent for delivery to the user agent in response to receiving the no-return-request information.In another aspect, a resource including a no-return markup element is received from a server. A determination is made, based on the no-return markup element, that a command identified based on the resource is non-returnable. In response to the determination, a no-return indicator is set to send no command response for the command for delivery to a user agent requesting the command.