In what ways are currency-exchange bureaus used for money laundering?

Not all currency exchanges / stores are used for money laundering. The key item in cash/currency based money laundering using money transfer shops or currency exchange booths is your ID. For certain amounts and for all money transfer services, a copy of your ID is retained. In money-laundering this ID is used again and again to generate fake transactions bearing your name, for transactions with the explicit purpose to launder money.