Customs agents seized more than $25,000 from a Nigerian man who arrived at BWI Thurgood Marshall Airport from London on Wednesday after he failed to disclose the cash.
Federal law does not restrict the amount of cash people entering and exiting the United States can carry with them, but any amount above $10,000 must be declared.
The man first told a U.S. Customs and Border Protection agent at BWI he was carrying $6,000, then told another agent he was carrying $8,000 and 800 British pounds, the agency said Thursday.
When the agents searched the man's luggage, they found $25,316; 1,385 British pounds; 450 Euros and "a few Nigerian Naira" — worth a total of $28,280.
The agents seized the U.S. and Nigerian currency, but returned the British pounds and the Euros to the man "for humanitarian relief," the agency said.
The agents also advised the man how to petition for the return of his money.
"Customs and Border Protection reminds all travelers that the easiest way to hold on to one's currency is to truthfully report all of it to a CBP officer," said Dianna Bowman, CBP director for the port of Baltimore, in a statement.