Which relevant assertion is primarily concerned with ensuring that revenue transactions are not overstated?

The assertion that is primarily concerned with ensuring that revenue transactions are not overstated is existence. This relevant assertion ensures that recorded revenues truly reflect actual transactions and that these transactions have indeed occurred. When auditors evaluate the existence assertion, they focus on confirming that revenue recorded in the financial statements pertains to real sales and that the company has delivered goods or services to customers. If revenues are overstated, it can mislead stakeholders regarding the financial health of the organization.

In the context of financial reporting, existence primarily aims to verify that a company's revenues are not only recorded but actually occurred, thus providing assurance against revenue inflation. For instance, auditors might conduct tests such as confirming sales transactions with customers or examining shipping documents to confirm that goods were indeed delivered.

While accuracy deals with ensuring that recorded revenue amounts are correctly calculated and recorded, its primary focus is on the correctness of the figures rather than confirming the occurrence of the transactions themselves. Completeness refers to whether all transactions that should be recorded are actually recorded, while cutoff looks at whether revenues are recorded in the appropriate accounting period. Therefore, the existence assertion is key in addressing the risk of overstating revenue transactions.