TD Bank is the biggest bank to plead guilty to Bank Secrecy Act violations. The Bank Secrecy Act which was enacted in 1970 to combat money laundering requires banks to establish and maintain programs that guard against money laundering.

TD Bank pleaded guilty to federal money laundering charges Thursday, agreeing to pay more than $3 billion in fines for enabling drug traffickers and other criminals to open accounts and transfer money through the bank.

TD Bank agreed to pay about $3 billion in fines to U.S. authorities and pleaded guilty on Thursday to money-laundering-related charges in a case brought by federal prosecutors, who said the Canadian bank made it “convenient” for criminals to open accounts, transfer funds and even deposit seven-figure sums of cash at its branches.