Howlin' Wolf has filed a lawsuit against StubHub. The music venue in New Orleans is taking action. It centers on speculative ticket sales. Tickets were listed on StubHub before the venue verified them. StubHub is an online ticket resale marketplace. Speculative sales happen when sellers list tickets they have not acquired. Howlin' Wolf says this occurred without approval. No more details have been given. The lawsuit aims at this kind of premature listing. StubHub permits resales, but this case challenges the timing.