A woman walks towards the entrance to Residencial Las Terrazas in the mountains near Santa Ana, Costa Rica, Tuesday, May 28, 2013. Costa Rican police raided one of residences of Las Terrazas as well as two other homes and five businesses related to Liberty Reserve and seized papers and digital documents that will be turned over to U.S. authorities. Costa Rican police said in a statement that Liberty Reserve founder Arthur Bodovsky, who became a Costa Rica national after giving up his U.S. citizenship, was arrested in Spain last week on money laundering charges, and that several properties linked to his company had been raided. AP Photo/Enrique Martinez A car drives past the Forum Business Center where two of the businesses linked to Liberty Reserve; Silverhand Solutions and Technology, and Cyberfuel.com, are located, near Pozos de Santa Ana, 20 kms north-west of San Jose, Costa Rica, Tuesday, May 28, 2013. Costa Rican police raided raided three homes and five businesses related to Liberty Reserve and seized papers and digital documents that will be turned over to U.S. authorities. Costa Rican police said in a statement that Liberty Reserve founder Arthur Bodovsky, who became a Costa Rica national after giving up his U.S. citizenship, was arrested in Spain last Friday on money laundering charges, and that several properties linked to his company had been raided. Mythili Raman, left, Acting Assistant Attorney General for the Criminal Division of the Dept. of Justice, accompanied by Preet Bharara, U.S. Attorney for the Southern District of New York, addresses a news conference, in New York, Tuesday, May 28, 2013. Arthur Budovsky,the founder of Liberty Reserve,an online currency transfer business, was indicted in the United States along with six other people in a $6 billion money-laundering scheme described as "staggering" in its scope, authorities said Tuesday. Mythili Raman, Acting Assistant Attorney General for the Criminal Division of the Dept. of Justice, addresses a news conference, in New York, Tuesday, May 28, 2013. NEW YORK (AP) - When an undercover agent posing as a new client sought to register at the currency transfer firm Liberty Reserve as "Joe Bogus" from "123 Fake Main Street" in "Completely Made Up City," no one at the company based in Costa Rica objected. The same client recording digital currency transactions as "ATM skimming work" and "for the cocaine"? Still no problem. In fact, federal prosecutors in Manhattan say anonymity and criminality were what Liberty Reserve was all about. "The only liberty that Liberty Reserve gave many of its users was the freedom to commit crimes, as it became a popular hub for fraudsters, hackers, and traffickers," U.S. Attorney Preet Bharara said Tuesday in announcing charges against seven people in a $6 billion scheme that he billed as possibly the largest money-laundering scheme even seen in the United States. "The coin of the realm ... was anonymity - multiple layers of anonymity," he added. As alleged, Liberty Reserve was deliberately structured and operated in a way to help other criminals remain anonymous, untraceable and untouchable. U.S. officials said the enterprise was staggering in scope: Over roughly seven years, Liberty Reserve processed 55 million illicit transactions worldwide for 1 million users, including 200,000 in the U.S. The network charged a 1 percent fee on transactions through "exchangers" - middlemen who converted actual currency into virtual funds and then back into cash. In the indictment, prosecutors called Liberty Reserve "one of the principal means by which cyber criminals around the world distribute, store and launder proceeds of their illegal activity ... including credit card fraud, identity theft, investment fraud, computer hacking, child pornography and narcotics trafficking." Alleged founder Arthur Budovsky - an American who renounced his U.S. citizenship after deciding to set up in Costa Rica - and another defendant, identified as Azzeddine el Amine, were arrested Friday at a Madrid airport while trying to return to Costa Rica, according to a Spanish court official, who spoke on condition of anonymity because court policy forbids him from speaking on the record. Two other men were arrested last week in New York City, including Liberty Reserve co-founder Vladimir Kats. There was no public record of their arraignment on Friday night, and there was no immediate response to phone messages left Tuesday with their attorneys. Of the remaining defendants, one was in custody in Costa Rica and two were at large there. Budovsky, 39, and Kats, 41, have previous convictions on state charges related to an unlicensed money-transmitting business, according to court papers. After that case, the pair decided to move their operation to Costa Rica, the papers said. As part of the Liberty Reserve investigation, authorities raided 14 locations in Panama, Switzerland, the U.S., Sweden and Costa Rica. Associated Press writers Raphael Satter in London, Alan Clendenning and Jorge Sainz in Madrid, and Javier Cordoba in San Jose, Costa Rica, also contributed to this report.