Audit and Assurance · Assertions and audit evidence

Specific Audit Evidence for Inventory, Receivables and Estimates

Updated 11 October 2026 · Fact-checked

Specific audit evidence means choosing procedures that fit the item and the assertion at risk. For inventory you attend the count; for receivables you send confirmations; for estimates you test management's method, data and assumptions. Written representations support but never replace evidence. You document all work in working papers.

Understand Specific Evidence: Inventory, Receivables and Estimates

Audit evidence must be sufficient (enough) and appropriate (relevant and reliable). For each balance, you ask which assertion is at risk, then pick the procedure that gives the most reliable evidence for it.

Inventory. ISA 501 requires you to attend the count if inventory is material. Attending gives direct evidence of existence and condition. Before the count you review the client's instructions. During it you observe staff following those instructions, perform test counts from floor to list (existence) and from list to floor (completeness), note damaged or obsolete items, record cut-off details such as the last goods received and dispatched numbers, and get copies of count sheets. After the count you trace your test counts to the final inventory records and check cut-off. Attendance does not prove rights or valuation. For those you inspect purchase invoices and compare cost with net realisable value.

Receivables. An external confirmation (circularisation) is reliable because it comes from a third party in writing. It mainly tests existence of receivables and, to a lesser degree, rights and obligations. It is weak for valuation, because a customer may confirm a balance but be unable to pay. You control the process: you select the sample, you send the requests and replies come straight back to you. If a customer does not reply, you send a follow-up and then carry out alternative procedures, such as checking cash received after the year end and inspecting dispatch documents and invoices. Credit balances are tested for understatement, so you need to include them in the sample.

Accounting estimates. Examples are the allowance for receivables, inventory write-downs, depreciation and provisions. ISA 540 (Revised) requires you to understand how management makes the estimate, then respond to the assessed risk. You can test the method, data and assumptions used by management, test the operating effectiveness of the related controls, make your own point estimate or range and compare it with management's, or review events up to the date of your report. You also consider indicators of management bias. The higher the estimation uncertainty, the more evidence you need.

Representations and documentation. Under ISA 580, written representations are obtained from management to confirm their responsibilities and to support other evidence. They are not sufficient evidence alone on any matter that is material. If management refuses to provide them, or you doubt their integrity, you consider the effect on the opinion. Under ISA 230, your working papers must be enough for an experienced auditor with no prior connection to the audit to understand the procedures performed, the evidence obtained and the conclusions reached.

Key rules to remember

Inventory count attendance (ISA 501): Material inventory → attend the count, unless impracticable → otherwise perform alternative procedures; If attendance is impracticable and no alternative gives enough evidence, you consider a modified opinion.
Direction of count tests: Floor → list = existence; List → floor = completeness; State both directions in answers.
Confirmation follow-up: No reply → follow up → alternative procedures; Examples of alternatives: subsequent cash receipts and dispatch documents.
Responding to estimates (ISA 540): Test method, data and assumptions OR use own estimate/range OR review later events OR test controls; Choice depends on assessed risk.
Reliability of evidence: External > internal with strong controls > internal with weak controls; original > copy; written > oral; Use this to justify why one procedure beats another.
Documentation test (ISA 230): Working papers must let an experienced auditor understand procedures, evidence and conclusions; Include who performed and reviewed the work, and when.

How to solve Specific Evidence: Inventory, Receivables and Estimates questions

Use this method for any question on specific evidence for a balance or an estimate.

1Identify the item (inventory, receivables, estimate, representation, documentation) and read the scenario for risk factors.
2State which assertion is at risk, such as existence, completeness, valuation or cut-off.
3Pick the procedure that gives the most reliable evidence for that assertion.
4Write each procedure as an action: what you do, on what, and what it proves.
5Add the limitation, for example that a confirmation does not prove recoverability.
6Address non-response, refusal or impracticability, and give the alternative procedure.
7Conclude with the effect on the audit, such as extra work or a modified opinion, and note the documentation required.

Quickest way: Assertion-procedure pairing

When to use it: Use for Section C requirement asking for audit procedures, and for quick objective questions on which procedure fits which assertion.

Write the assertion in the margin.
Write one procedure per mark available.
Start each point with a verb: observe, count, inspect, agree, send, trace, recalculate.
Add one limitation if a mark is likely for evaluation.

Common mistakes in Specific Evidence: Inventory, Receivables and Estimates

Listing general audit procedures instead of ones for the specific item.
Students recall a generic list of procedures.
Fix: Tie every procedure to the named balance and assertion in the scenario.
Saying a receivables confirmation proves the debt is recoverable.
Confirmation feels strong, so students overstate it.
Fix: Say it mainly supports existence. Test valuation through post year-end cash receipts and ageing review.
Testing count sheets only in one direction.
Students forget completeness needs the opposite direction.
Fix: Do floor to list for existence and list to floor for completeness.
Treating written representations as sufficient evidence.
They are signed by senior management so seem authoritative.
Fix: State they support but never replace other evidence, especially on material matters.
Accepting non-reply to a confirmation as an error.
Students assume silence means a problem.
Fix: Follow up, then perform alternative procedures. Only investigate if those fail or differences arise.
Writing 'review the estimate' without saying how.
Estimates feel abstract.
Fix: Name the actions: test the data, challenge assumptions against past accuracy, recalculate, develop your own range, check later events.

Worked examples

Example 1

Your client, a distributor, holds material inventory in three warehouses. The year end is 31 December and the count is on that date. List the audit procedures you would perform at the count (6 marks).

Show the solution

Identify the assertions: existence, completeness, condition and cut-off.
Before counting, discuss and review management's count instructions to confirm they are adequate.
Observe whether staff follow the instructions, such as sheet control and freezing of movements.
Select items from the floor and agree them to the count sheets (existence). Select items from the count sheets and find them on the floor (completeness).
Note damaged, obsolete or slow-moving items for the valuation work.
Record the numbers of the last goods received and dispatched notes for cut-off testing.
Take copies of count sheets so you can trace them to the final inventory list later.

Answer: At the count you review the instructions, observe staff following them, perform test counts in both directions, note damaged or obsolete items, record cut-off details and obtain copies of count sheets to trace to the final inventory records.

Example 2

Your client's receivables balance is ₹4,80,00,000. You have sent confirmation requests to a sample of customers. One customer with a balance of ₹12,00,000 has not replied after a second request. Explain what you do and the limits of confirmations (5 marks).

Show the solution

Recognise that non-response is not itself an error, but the evidence is still missing.
Perform alternative procedures on the ₹12,00,000 balance.
Agree the balance to invoices and dispatch documents to support existence.
Check cash received after the year end from this customer to show the debt was real and recoverable.
Note that the confirmation mainly supports existence, not valuation.
For valuation, review the ageing and the allowance for credit losses.

Answer: Follow up again, then agree the balance to invoices, dispatch documents and post year-end cash receipts. A confirmation mainly supports existence, so you must separately test valuation using ageing analysis and the credit loss allowance.

Exam tips

Read the requirement verb. 'List' needs short actions; 'explain' needs the reason or limitation too.
Use the scenario facts, for example high-value or perishable inventory, or customers in disputes, to tailor procedures.
In objective questions, match the procedure to the assertion and watch for traps such as direction of testing.
For representations, always say they cannot replace other evidence and consider the effect of refusal.
When asked about documentation, link it to ISA 230's test of an experienced auditor understanding the work.

Specific Evidence: Inventory, Receivables and Estimates in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Specific Evidence: Inventory, Receivables and Estimates: frequently asked questions

Do I always have to attend the inventory count?

If inventory is material, ISA 501 requires you to attend unless it is impracticable. If you cannot, you perform alternative procedures. If these do not give enough evidence, you consider modifying the opinion.

What is the difference between a positive and a negative confirmation?

A positive confirmation asks the customer to reply whether or not they agree. A negative one asks for a reply only if they disagree. Positive confirmations give more reliable evidence, so they are used where risk is higher.

Can representations replace audit evidence?

No. Written representations support other evidence but are not sufficient alone on any material matter. They also confirm management's responsibilities, as ISA 580 requires.

What does ISA 540 expect for accounting estimates?

You understand how management makes the estimate and assess the risk of material misstatement. You then respond by testing method, data and assumptions, making your own estimate or range, or reviewing later events. You also look for management bias.