The U.S. House of Representatives Ethics Committee has ordered Rep. Madison Cawthorn, R-N.C., to pay more than $15,000 in punitive donations and fines as a result of his violation of congressional and governmental ethics rules around a little-known digital currency.

Cawthorn, who lost the Republican nomination for his seat after a series of controversies, failed to disclose holdings in the token branded "LGB Coin" in accordance with House ethics rules and federal law, a committee investigation concluded. Cawthorn did not file required disclosures for his holdings until after an investigation began, and he promoted purchase of the token publicly after purchasing $150,000 worth of the coins.