It's important to understand that we do not police trades between players. The Market Board exists to thwart the uncertainty of making trades between players. If you are making a trade with another player either in exchange for a gift or gold, know that you are doing this AT YOUR OWN RISK.
If you would still like to report a player, please contact Nexon Player Support.
Nexon website > Log-in > Click the "Get Support" button on the top > Click the "Submit a Request" button on the top, or click the "Submit a Request" button on this page.