...and remember, even BB has a regulatory agency. Get their address. One point for your letter: This is simple bad faith and if BB will do it to our bank, they will do it to consumers as well.
BB knows it can't stop payment on a cashiers check, but (like BB's everywhere) it relies on the schoolyard taunt: "What are you going to do, sue me?"
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.