5) Dr. Hibbert is concerned with internal controls over checks received from patients at Springfield Hospital. All checks received in the mail are sent to the accounting department, where they are stamped "For Deposit Only". The accounting department records the checks and also deposits the checks weekly. a. What principle of internal control is being violated? b. How could a new policy improve this internal control violation? 6) Lard Lad Donuts prepares customer invoices on plain blank paper. a. What principle of internal control is being violated? b. How could a new policy improve this internal control violation