Audit evidence must be sufficient (quantity) and appropriate (quality: relevant and reliable) to support auditor conclusions. Sufficiency refers to having enough evidence based on risk and materiality, while relevance means it directly addresses specific assertions. Reliability indicates the trustworthiness, often higher when obtained directly from independent, external sources.
Relevant evidence will be evidence that relates directly to the assertion being tested – if it doesn't then why is it being used? Reliable evidence is evidence which the auditor can have faith is trustworthy.
ISA (UK) 500 contains a discussion on what 'sufficient appropriate evidence' means. Sufficiency is seen as a measure of the quantity of audit evidence and appropriateness is a measure of its quality, including its relevance and its reliability.
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.
Sufficiency is the measure of the quantity of audit evidence, relevancy is the ability to answer the audit objective or assertion and reliability relates to credibility and consistency. Compliance audit Financial audit Performance audit Review. Concept. Ref: 16.210.
Reliability: Reliable evidence is trustworthy and free from bias. Factors such as the source, the quality of internal controls, and the nature of the evidence influence its reliability.
Relevance. The relevance of audit evidence refers to its relationship to the assertion or to the objective of the control being tested.
Audit evidence needs to have two essential characteristics: reliability, which guarantees that it is dependable and verifiable, and relevance, which means it should directly relate to the audit objectives. Auditors consider these attributes to make well-informed judgments.
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.
Audit evidence is generally considered to be more reliable when it is: obtained from an independent and external source. generated internally by the client, but is subject to an effective system of internal control. obtained directly from the auditor.
- 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.
Principles of the Code of Ethics. The Internal Auditor's Code of Ethics is anchored in four fundamental principles: integrity, objectivity, confidentiality, and competency. These principles guide auditors in their professional conduct and decision-making, ensuring they uphold the highest standards of behaviour.
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.
This phrase basically means that the team has gathered enough evidence to reasonably state that the financial statements are free from material misstatement. Sufficiency addresses the quantity of audit evidence while appropriate addresses the quality (relevance and reliability) of audit evidence.
Relevance requires that accounting information is capable of affecting decisions made by its users. This relates to timeliness, comparability, and understandability. Reliability refers to undistorted complete information that is free from errors. Verifiability and credibility are important issues here.
Let's take a closer look at each of the different assertion types and how they work.
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.
The relevance of audit evidence refers to its relationship to the assertion or to the objective of the control being tested.
Appropriateness: The quality, relevancy, and reliability of the evidence. Sufficiency: The quantity of audit evidence — enough evidence to evaluate the audit client's management assertions. Evaluation: A decision on whether the evidence is compelling enough to allow you to form an opinion.
Reliability: Depends on evidence source and nature, with external sources typically more reliable. Sufficiency: Quantity of evidence needed based on risk levels and materiality. Appropriateness: Combines relevance and reliability considerations for audit assertions.
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.
Direct evidence — directly proves a fact. This type of evidence can include eyewitness testimony, video recordings, or confessions. It is considered the most reliable form of evidence and can be used to prove a defendant's guilt or innocence. Circumstantial evidence — suggests a fact but does not directly prove it.
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.
A given set of audit procedures may provide audit evidence that is relevant to certain assertions, but not others. For example, confirmation of balance from a customer is a relevant evidence as regards existence of receivable, but it may not be relevant as regards the collectability of the balance due from customer.
There are five elements of a finding: