National Advertising Division (NAD) has recommended that DraftKings stop its claim of being the largest US-based fantasy sports site as the company regularly does.

The two biggest daily fantasy sports sites have locked horns on who has claims of being the “largest US-based” fantasy sports website and FanDuel, which filed the complaint, is in the right in this particular instance.

FanDuel claimed that its rival is engaging in false advertising because it promotes itself as the “largest U.S.-based destination for daily fantasy sports” is invalid.

For its part, DraftKings is arguing that it hasn’t made claims of being larger than FanDuel, conceding that its rival does have more users and offers larger guaranteed prize pools. It instead bases its claim on its belief that FanDuel isn’t a US-based company as it traces its roots to Edinburgh, Scotland where FanDuel CEO Nigel Eccles is based.