Medium2 marksMultiple Choice
Audit EvidenceAudit EvidenceReliabilityExistenceSyllabus Area D

ACCA · Question 14 · Audit Evidence

SECTION A - CASE 3: AQUAPURE UTILITIES

AquaPure Utilities is a highly regulated public utility company managing water and waste services. You are auditing the financial statements for the year ended 31 March 20X6.

During the audit, you note the following:

  1. AquaPure has a large internal audit (IA) department that recently completed a review of the procurement controls.
  2. The billing system is highly automated, generating millions of micro-invoices based on smart meter readings.
  3. The company owns a vast network of underground water pipes, which are difficult to physically verify.
  4. You plan to use substantive analytical procedures to audit water revenue.

Question:
Regarding the existence of the underground water pipes, which of the following provides the most reliable audit evidence?

Answer options:

A.

A written representation from the Chief Engineer confirming the pipes exist.

B.

Invoices from the construction companies that originally laid the pipes 15 years ago.

C.

Video footage from maintenance cameras operated by an independent third-party surveyor.

D.

The fixed asset register showing the capitalized value of the pipes.

How to approach this question

Apply the rules of evidence reliability: External > Internal; Direct > Indirect; Documented > Oral. Third-party video footage is external and direct physical evidence.

Full Answer

C.Video footage from maintenance cameras operated by an independent third-party surveyor.✓ Correct
Audit evidence is more reliable when it is obtained from independent sources outside the entity, and when it is obtained directly by the auditor (or an expert/third party acting on their behalf). Video footage from an independent surveyor provides direct, external evidence of physical existence, making it much more reliable than internal documents or management representations.

Common mistakes

Choosing invoices (Option B) - while external, they are historical and do not prove current existence. Choosing the Fixed Asset Register (Option D) - this is just a list, not proof of existence.

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