I Google it.
Financial statement assertions are classified into the following five:
1. Existence: The assertion on existence is made to check whether the
specified assets and liabilities are present at the given date. It is also
required to check that the transactions that are recorded took place at the
specified date. In order to test these items of the financial statement, it
is not sufficient that only books are consulted which record the assets or
the liabilities. There should be proof of th