The Myanmar-born perfume entrepreneur who was the top buyer of oil and gas leases at U.S. federal auctions last year has been sued for fraud by a Texas woman alleging she paid more than half a million dollars for "worthless" contracts.

Tha Cin, an immigrant from Burma who runs a sushi-making business in Texas, filed a lawsuit against Levi Sap Nei Thang and two of her companies in federal court in Houston last week.