The strongest audit evidence is typically that which is obtained directly by the auditor, comes from independent external sources, is in original documentary form, and/or arises from strong internal controls. Key examples include physical inspection of assets, third-party confirmations (e.g., bank confirmations), and direct reperformance of calculations.
External confirmation is one of the most reliable forms of audit evidence because it comes from independent sources. Common examples include: Bank confirmations. Accounts receivable confirmations.
Evidence reliability follows a general hierarchy:
For audit evidence to be reliable, you have to consider the nature and source of the evidence. There are a number of ways for an audit team to obtain evidence. The visual below illustrate the hierarchy of evidence, with direct and personal knowledge being the highest reliability and oral evidence being the lowest.
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.
Physical evidence is objective and when documented, collected, and preserved properly may be the only way to reliably place or link someone with a crime scene. Physical evidence is therefore often referred to as the "silent witness."
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.
What Are the Types of Audit Evidence?
According to this article from Chron, physical inspection, confirmation from a third party, and inspection of records and documents are considered three of the most reliable audit procedures.
Companies typically conduct annual audits of their financial documents, including income statements, balance sheets, and cash flow statements. Financial institutions often require external audit reports as part of lending agreements.
Which Taxpayers the IRS Audits Most Often. Oddly, people who make less than $25,000 have a relatively high audit rate. This higher rate is because many of these taxpayers claim the earned income tax credit, and the IRS conducts many audits to ensure that the credit isn't being claimed fraudulently.
An unqualified opinion, AKA a clean opinion, is the best type of audit opinion a company can receive–and probably the best type for you too. It indicates that the auditor found the financial statements to be fairly presented in all material respects, as required by the applicable financial reporting framework.
Systematic Reviews and Meta Analyses
Well done systematic reviews, with or without an included meta-analysis, are generally considered to provide the best evidence for all question types as they are based on the findings of multiple studies that were identified in comprehensive, systematic literature searches.
Table of Contents
The eight primary types of audit evidence include physical examination, confirmations, documentary evidence, analytical procedures, oral evidence, the accounting system, reperformance, and observatory evidence.
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.
Audit tips and tricks key takeaways:
What is the most reliable type of evidence? Physical evidence, such as fingerprints, DNA, and video recordings, is often the most reliable since it is difficult to dispute in court.
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.
5 Common Sources Of Substantive Audit Evidence
Four Audit evidence that is needed to create an audit program are:
Internal Audit Reports: The 5 Cs
Criteria: What needs to be audited and why? Condition: What are the observed circumstances surrounding any issues? Consequence: How do the issues found affect the company? This might include financial, regulatory, security, publicity, or other effects.
Determining Sufficiency Through Risk and Materiality. Risk assessment directly affects how much audit evidence auditors need. Higher risks mean auditors should collect more evidence. The risk-materiality relationship creates the foundation for determining sufficient evidence.