How do sweet deals from sites like DontPayFull.com work? On-site, we have a set of national capital region coupon codes, national capital region promotional codes and national capital region discount codes. For the national capital region offers and extra items, you can find corresponding coupon codes as well. When you visit the online shopping site where you are making a order from, all you have to do is key in the coupon code. It works pretty much the same mode that an actual magazine or newspaper coupon does. Once the code is applied, you can get a sure percentage off the original price - which means big savings for your online shopping purchases!