Audit evidence is appropriate when it is both relevant to the audit objective (assertion) and reliable in nature, source, and timing, allowing it to support audit conclusions. It must directly address the specific claim being tested—such as existence or completeness—and come from trustworthy, independent, or verified sources.
6. Appropriateness is the measure of the quality of audit evidence, i.e., its relevance and reliability. To be appropriate, audit evidence must be both relevant and reliable in providing support for the conclusions on which the auditor's opinion is based.
Sufficient appropriate audit evidence must be obtained to provide a reasonable basis to support the conclusion(s) expressed in an assurance engagement report. the determination of the relevance and reliability of audit evidence.
Good auditing evidence is identified by these characteristics: Sufficiency: Sufficiency means having enough material for an accurate auditor judgment. One bank statement isn't enough to determine a company's financial standing. Reliability: Reliability ensures the material can be trusted, usually based on its source.
Audit documentation should be prepared in sufficient detail to provide a clear understanding of its purpose, source, and the conclusions reached. Also, the documentation should be appropriately organized to provide a clear link to the significant findings or issues.
The 5 Cs of audit (Criteria, Condition, Cause, Consequence, Corrective Action) are a framework for structuring clear, actionable audit findings, explaining what should be (Criteria), what is found (Condition), why it happened (Cause), what the impact is (Consequence/Effect), and how to fix it (Corrective Action/Recommendation) to drive organizational improvement and compliance.
Maintaining the quality of audit evidence involves various factors, including the competency and independence of the auditor, the reliability of the information sources, and the thoroughness of documentation.
A successful internal audit function relies on four fundamental pillars, often referred to as the “4 C's”: Competence, Confidentiality, Communication, and Collaboration. These principles guide auditors in delivering meaningful and impactful results. Let's explore each of these elements in detail.
Suitable criteria exhibit the following characteristics: relevance, completeness, reliability, neutrality and understandability.
Good evidence needs to be reliable. It is representative, not just an isolated case, and it is information upon which an institution can take action to improve. It is relevant, verifiable, representative, and actionable.
Audit evidence is critical for verifying the accuracy of financial statements and supporting auditors' opinions. Different types of audit evidence include physical examination, documentation, observations, inquiries, confirmations, analytical procedures, and reperformance.
Physical Evidence
This type of evidence is tangible and as a result, it is the most reliable and persuasive form of evidence that can be used in any internal and external audit. Such evidence can be: Counted. Inspected.
5 Common Sources Of Substantive Audit Evidence
Sufficient appropriate audit evidence:
- Sufficient – is the measure of the quantity of audit evidence. E.g. the sample chosen should be large enough to be representative. - Appropriateness – is the measure of the quality of audit evidence. To be of good quality it should be relevant and reliable.
Let's take a closer look at each of the different assertion types and how they work.
There are four main types of audit evidence: external evidence from third parties, evidence obtained directly by auditors, evidence from original documents rather than copies, and documentary evidence. Both relevance and reliability are important in evaluating audit evidence.
Working through the condition, criteria, effect, cause, and recommendation can produce more meaningful audit results. Applying the five attributes -- condition, criteria, effect, cause, and recommendation -- effectively can help a practitioner become an exceptional auditor.
An appropriate underlying subject matter is identifiable and capable of consistent measurement or evaluation against the applicable criteria and can be subjected to procedures for obtaining sufficient appropriate evidence to support a reasonable assurance or limited assurance conclusion, as appropriate.
Audit criteria are a key contributor to an audit's strength and potential impact. Audit procedures focus on determining whether criteria are met or not met. Suitable criteria are clear, concise, relevant, reliable, neutral, understandable, and complete.
The Big 4 are the largest accounting and auditing firms in the world: Deloitte LLP (Deloitte), PricewaterhouseCoopers (PwC), Ernst & Young (EY) and Klynveld Peat Marwick Goerdeler (KPMG). They're so big that their joint revenue in 2024 was—you guessed it—$212 billion.
The Audit Bureau of Circulations (ABC) of India is a non-profit circulation-audit organisation. It certifies and audits the circulations of major publications, including newspapers and magazines in India.
The “5 P's of Internal Audit” includes 5 video-clips presenting testimonials from audit managers on the topics of Plan, Perform, People, Profile and Product.
This phrase basically means that the team has gathered enough evidence to reasonably state that the financial statements are free from material misstatement.
The sufficiency of audit evidence is determined by several factors, including the assessed risk of material misstatement, the materiality of the item being tested, the effectiveness of the client's internal controls, and the reliability of evidence obtained.
Four Audit evidence that is needed to create an audit program are: