Your opponents feel that they are at a disadvantage, as even though you alert and explain the bids, they don’t have a partnership agreement on how to bid over them. For Transfer Walsh you could prepare two laminated index cards with a simple defense, stating: Responder is making a transfer to own suit, much like transfers over notrump openings. Over Transfer: Double = Would have doubled if responder had bid own suit 1 of responder’s suit = natural overcall, not forcing Rest as if responder had bid own suit Hand the cards to the opponents when you alert Transfer Walsh.