Create a profile on their site. They have a section with instructions on how to send a box in, how much the box can weigh, what items they accept, etc. You can print a shipping label with your printer or they can send you one. Group outfits together in baggies - that's the best way to make money off your smaller items. Send your box in, wait at least eight weeks to see any items listed. Feel the disappointment set in as you see at least 1/3 of your box get rejected. Wonder why another 1/3 of your box is missing. Try and decide whether you want to pay for those items to be shipped back, and feel the mounting anger as you get no help or spotty help from customer service. Now wait a whole year as your 1/3 remaining items sell and Swap.com nickel-and-dimes any profit.