Regarding observation as an audit technique, which statement is true?

• A. It is the most effective audit methodology to use in filling out internal control questionnaires
• B. It is the most persuasive technique to learn how transactions are really processed during the period under audit
• C. It is rarely sufficient to satisfy any audit assertion other than existence
• D. It is the most persuasive audit technique for determining if fraud has really occurred

Answer: (C)

Observation provides direct, real-time evidence about what exists or is happening at a given moment. Because it gives a snapshot of a process or asset in the moment you observe it, it is most useful for supporting existence (that something actually exists or a process is in place). However, by itself it rarely addresses other assertions like completeness, accuracy, valuation, or rights and obligations, since those require examining documents, testing samples over time, or corroborating evidence from other sources. It also isn’t the strongest tool for detecting fraud, which often requires a broader mix of procedures and corroborating evidence. So, while observation is valuable, it is rarely sufficient on its own to satisfy audit assertions beyond existence.