By preparing a four-column bank reconciliation ("proof of cash") at year-end, an auditor will generally not be able to detect:
a. An unrecorded deposit made at the bank at the end of the month.
b. A second payment of an account payable which had already been paid in full two months earlier.
c. An unrecorded check cashed during that month.
d. A bank charge during the month not recorded on the books.