segregation of duties

Paper instructions:

What policies or procedures would you recommend to reduce the risk of these activities
occurring? Note: Use complete sentences and be specific (e.g., don’t just write
“segregation of duties”). Two to three sentences is sufficient.
1. A clerk faxes a fake sales invoice to a company that purchases large quantities of
goods. The clerk plans to intercept that particular payment and pocket the money.
2. The bookkeeper at a construction company has each of the three owners sign a
different paycheck for her. Each check is drawn from a separate account of the
company.
3. A clerk in HR creates a fake employee and takes the fake employee’s paycheck
and cashes it.
4. A clerk in A/R takes $250 in cash from a customer payment and prepares a credit
memo to reduce the balance by the $250.
5. A hacker manages to break into a company’s computer system by guessing the
password of his friend – Champ, the name of the friend’s dog.
6. A company’s IT staff traces a virus to an individual that accidentally introduced it
when he downloaded a computer game from the Internet.
7. A clerk at a medical lab recognizes the name of an acquaintance as one of those
patients whose lab tests are “positive” for an infectious disease. She mentions is
to a mutual friend, and before long, the entire town knows about it.