The document discusses various techniques for committing and concealing fraud such as sales skimming, skimming of receivables, and cash larceny. Sales skimming occurs when an employee makes a sale but does not record it. Skimming of receivables can be done through techniques like lapping, falsifying receipt records, and stealing customer payments. To detect cash larceny, organizations should enforce separation of duties for cash handling and independent verification of sales records, deposits, and bank receipts.