Friend lost there maven invitation in the guild stash

I was offline and the only people who are playing this league in our guild are my friend and me. While storing stuff in the guild stash tab he accidentally stored the maven invitation and it disappeared. We noticed one of the tabs was set to blight and was causing are oils to disappear but now a maven invitation is a whole other issue.

never mind he's just stupid and didn't realize he got a searing exarch thing