The large informal economy is a significant market for illicit or smuggled goods. The under-invoicing of imports and exports by Dominican businesses is a relatively common practice for those seeking to avoid taxes and customs fees, though the government is making efforts to sanction violators with fines. The major sources of laundered proceeds stem from illicit trafficking activities, tax evasion, and fraudulent financial activities, particularly transactions with forged credit cards. U.S. law enforcement has identified networks smuggling weapons into the DR from the United States.