The Justice Department asked the bank to provide similar paperwork for a fifth firm, Banco Monex, that’s not connected to Hank Rhon; for a number of money-transfer businesses, and less- detailed information on more than a dozen other companies.
The documents indicate the Justice Department is examining anti-money laundering practices at Banco Nacional de Mexico, Citigroup’s Mexico unit known as Banamex, and investigating whether any of its clients were involved in money laundering.
Molly Millerwise Meiners, a spokeswoman for Citigroup, declined to comment, as did a spokesman for Monex.