no longer true. you've got to get the cash. And if the cash withdrawal from a bank account is over $3500, the bank reports this as a "Large Currency Transaction Report". Those are sent to the feds who look into why an entity is moving cash currency instead of electronically. And when it is a high-profile subject, it gets worse. This has been done to track human trafficking and drug money.
Remember the Gov of NY, Elliot Spitzer, who got caught hooking up once a week with a high-end "escort?" He was taking out large cash withdrawals to pay her so it wasn't on a card. The bank reported it. The Feds were concerned he was being blackmailed so they followed him. They found him going to a hotel with a young lady a couple of times a week. Boom.
Moving cash is as hard as using electronic means these days. This is why drug dealers own high-cash businesses like car washes (breaking bad), pizza delivery, charities, and independent churches. Lots of inner city "charities" are fronts for drugs and prostitution so they can hide high-cash movements within the believable world of a high-cash business. Another example is the church that gave out coke in the series "Ozark" at some kind of weird sunday church boat gathering. The coke was put into bibles and paid for in cash. The "church" then deposits the money as if it was an "offering" of cash from the congregation.