Nono, Just {bncy}Gynx ;o
This will be shown through a notification of some sort that will be shown to whomever is in charge of the clan, I presume?
The way it works at the moment is, one clan invites another clan to a war then they tell that clan, and they check that page and accept the invite. There's not much point trying to start a war with a clan unless you tell them first, so I think it will be okay without notifications.