Classic "computer crime" from the Olden Daze...
Guy used his Apple II to print invoices, which he sent to pretty much every big oil company, engineering, and construction company in the south. He read all the business news and journals, found big multi-million dollar projects and sent invoices for random amounts between $500 and $1,000 with that project and a senior VPs name as the reference. He figured Accounts Payable wouldn't fuck with a VP Project leader of a $75,000,000 project over a few hundred bucks. He was right. It worked for a couple of years, until he got lazy (or too busy laundering krugerrands) and sent the same amount invoices a few months in a row; the AP people at Conoco thought $683.19 had already been paid twice, tried to contact him and discovered the invoice's main office street address was an empty lot in Houston, and ... busted.
Apparently he paid back some of the money, but nowhere close to all, did a couple in the slammer, got out and disappeared. Most of the victims were pretty embarrassed and wouldn't work with IRS, and the bank accounts that the money went through were regularly emptied by cashier's checks, payable to jewelers and coin dealers.