In the upper right hand corner under your shopping bag count you'll see the word register. Click it and fill out the information. Once you do the very next page will have your 15off100 code and it works immediately. Every little bit helps. -ilikethings

The code doesn't work on brand name items. I just tried. -Jay99

From the "small print" (thx Tuff2beat):

*If you signed up for macys.com text messages, you'll receive a confirmation text within 48 hours. **Offer excludes: Coach, Dooney & Bourke, Ed Hardy, Joe's Jeans, Lacoste, Tommy Hilfiger, 7 For All Mankind; O Bracelets, cosmetics & fragrances, gift cards, toys, sunglasses, fashion jewelry, designer jewelry, watches. FOR HER: American Rag, BCBGMAXAZRIA, Calvin Klein, Charter Club cashmere, DKNYC, Impulse, INC International Concepts®, Levi's®, Lauren by Ralph Lauren, North Face, Not Your Daughter's Jeans, MICHAEL Michael Kors, T Tahari. FOR HIM: American Rag, Calvin Klein, Claiborne, Club Room cashmere, Emporio Armani, Hugo Boss, INC International Concepts®, Kenneth Cole, Levi's®, Dockers®, Nautica, North Face, Polo Ralph Lauren, Tasso Elba, Tommy Bahama. FOR THE HOME: All-Clad, Barbara Barry, Calvin Klein, Henckels, kate spade, Lauren Ralph Lauren, Tommy Hilfiger, Tumi, Vera Wang, Waterford, Wusthof, Michael Kors Bedding, Natori Bedding, area rugs, electrics & electronics, furniture, Holiday Lane, regular-price china, silver and crystal, mattresses. Savings do not apply to Everyday Values, Jewelry Super Buys, web busters™, purchases on macysweddingchannel.com, purchases in Macy's stores or prior purchases, payments on credit accounts, gift wrap or shipping charges. Promo code expires 30 days after issuance of email.