Here is one we used this May for win win when the sale was on;
Burdine-Macy's Tax free passport:

Overseas visitors can get a passport that gives them 11% extra off items in Burdine-Macy's department stores (not cosmetics or perfume), and is valid on sale or reduced items. We got ours from the customer service desk but for more info try calling in the UK 020 7729 8147 or http://www.macys.com/index.ognc?DivisionID=3&bhcp=1