VICAccountingSyllabus dot point

What source documents does a trading business use to verify transactions, and which document supports each type of transaction?

Identifying the source documents used by a trading business to record financial transactions and explaining the role of source documents in providing verifiable evidence for the accounting process

A focused VCE Accounting Unit 3 Area of Study 1 answer on source documents. Identifies receipts, EFT records, bank statements, sales and purchase invoices, statements of account, cheque butts and memos, explains the role of each, and shows which document supports each transaction with a worked recording example.

Generated by Claude Opus 4.76 min answerUpdated 2026-05-29

Reviewed by: AI editorial process; not yet individually human-reviewed

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What this dot point is asking
The role of source documents
The main source documents
Internal versus external documents
Why this matters

What this dot point is asking

VCAA wants you to identify the source documents a trading business uses, explain why each transaction needs documentary evidence, and match the correct document to each transaction type. This underpins the qualitative characteristic of verifiability.

The role of source documents

Recording begins with a source document because the Conceptual Framework requires information to be verifiable: a knowledgeable observer should be able to check the entry against evidence. Documents also create an audit trail, allow GST to be substantiated for the Australian Taxation Office, and protect against fraud and error.

The main source documents

Each document drives a specific entry. A purchase invoice supports a debit to Inventory and GST Clearing with a credit to Accounts Payable. A receipt for a cash sale supports a debit to Bank and GST Clearing with credits to Sales, plus the cost of sales entry. A memo supports drawings of inventory recorded at cost.

Internal versus external documents

External documents involve another party (invoices, receipts issued to customers, bank statements) and are strong evidence because an independent party is involved. Internal documents such as memos are created by the business itself, so they are weaker evidence and are used only where no external party exists, for example recording the owner withdrawing inventory or recording depreciation by memo at balance day.

Reading documents and recording the transactions

The documents

A business has three documents for 1 July. A purchase invoice from a supplier for inventory of 1,000 dollars plus 100 dollars GST. A receipt issued for a cash sale of 660 dollars including 60 dollars GST, where the inventory sold cost 300 dollars. A memo recording the owner taking inventory costing 150 dollars for personal use.

Purchase invoice entry

Debit Inventory 1,000, Debit GST Clearing 100, Credit Accounts Payable 1,100. The invoice is the verifiable evidence of a credit purchase.

Cash sale receipt entries

Debit Bank 660, Credit Sales 600, Credit GST Clearing 60. Then Debit Cost of Sales 300, Credit Inventory 300. The receipt evidences cash in; the inventory card evidences the cost.

Memo entry

Debit Drawings 150, Credit Inventory 150. No GST and no revenue because the owner is not a customer; the memo is the only evidence because there is no external party.

Check

GST Clearing has a debit of 100 and a credit of 60, a net credit of 40 owing to the ATO. Every entry traces back to a named document.

Why this matters

The exam often shows you a document and asks for the journal entry, or asks which document supports a given entry and why. Knowing the eight documents and the verifiability link lets you both record correctly and justify the recording using the Conceptual Framework.

Exam-style practice questions

Practice questions written in the style of VCAA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.

2022 VCAA3 marksThe Accounts Payable ledger of BAX for June 2022 shows: 12 June Inventory/GST Clearing

77 000 (credit side); 16 June Bank

68 200 (debit side); 22 June Inventory/GST Clearing $2 200 (debit side). Identify the source document that would be used to verify the entries on 12 June, 16 June and 22 June.

Show worked answer →

Read each entry's direction and cross-reference to identify the document (one mark each).

12 June (credit, Inventory/GST): Accounts Payable increased by a credit purchase of inventory, so the source document is the purchase invoice received from the supplier.
16 June (debit, Bank): Accounts Payable decreased because cash was paid to the supplier, so the source document is the EFT (electronic funds transfer) record (a cheque butt or bank statement is also acceptable).
22 June (debit, Inventory/GST): Accounts Payable decreased through a return of inventory to the supplier, so the source document is the credit note received from the supplier.

2020 VCAA2 marksKitchen Central received a tax invoice from Wood n Set, Invoice W58 dated 24/04/2020, for 8 handcarved plate sets at

500 each (subtotal

4 000), GST

400, total

4 400, terms 3/7, n/30. Describe the transaction that led to this document.

Show worked answer →

A tax invoice received by the buyer evidences a credit purchase of inventory.

Kitchen Central purchased 8 handcarved plate sets on credit from Wood n Set for $4 000 (plus$ 400 GST), a total of $4 400 owing.

The terms 3/7, n/30 mean a 3% settlement discount is available if paid within 7 days, otherwise the full amount is due within 30 days. Because it is an invoice (not a receipt), no cash has yet changed hands, so the amount is recorded as an increase in Inventory and GST Clearing and an increase in Accounts Payable. Marks: identify it as a credit purchase of inventory and state the amount or that it is unpaid (on credit).