📚 Accounting (9215) Study Notes: Sources and Recording of Data

Chapter: The Use and Preparation of Source Documents

Hello future accountants! This chapter is incredibly important because it's where accounting begins. Think of source documents as the basic building blocks of all financial records. Without them, we'd just be guessing!

In this section, we will learn what these documents are, why they are essential, and how they provide the concrete evidence needed to accurately record every business transaction. Don't worry if this seems tricky at first—we’ll break down each document step-by-step!

1. What Are Source Documents? (The Evidence)

1.1 Definition and Purpose

A Source Document is the original, written evidence that a transaction has taken place. It is the very first piece of paperwork generated when money or goods change hands (or are promised to change hands).

  • The Law of Accounting: Every single entry recorded in the accounting books must be supported by a source document.
  • Purpose: They prove the financial details (date, amount, nature of the transaction) are accurate and legitimate.

Analogy: If you buy a ticket for the cinema, the ticket is the source document proving you paid money to see a film. If you lose the ticket, you can't prove you paid!

1.2 The Source Document Flow

The process of data recording always follows this path:

  1. A Transaction occurs (e.g., buying new inventory).
  2. A Source Document is created (e.g., a Purchase Invoice).
  3. The data from the document is recorded in the Books of Prime Entry.

Quick Review: The source document is the critical link between the real-world transaction and the accounting record.

2. Key Types of Source Documents and Their Uses

The OxfordAQA 9215 curriculum requires you to understand the primary documents businesses use daily, whether issued by the business or received from third parties.

2.1 Invoices (Selling and Buying on Credit)

An Invoice is used when goods or services are bought or sold on credit (payment will be made later).

A. Sales Invoice (We Issue)
  • Purpose: Issued to a customer when selling goods or services on credit.
  • Data Provided: Proof of sale and the amount the customer owes us.
  • Source for Recording: Used to record entries in the Sales Journal.
B. Purchase Invoice (We Receive)
  • Purpose: Received from a supplier when buying goods or services on credit.
  • Data Provided: Proof of purchase and the amount owed to the supplier.
  • Source for Recording: Used to record entries in the Purchases Journal.

2.2 Debit Notes and Credit Notes (Returns and Adjustments)

A. Debit Note
  • Purpose: Sent to a supplier to request a reduction in an invoice (e.g., when goods are returned as damaged, faulty, or overcharged).
  • Function: Acts as a formal request before a credit note is officially issued.
B. Credit Note
  • Purpose: Issued by a seller to confirm a reduction to an amount previously invoiced.
  • Why Issued: Customer returns goods, or an overcharge error occurred on the original invoice.
  • Source for Recording: Used to record sales returns or purchases returns in the returns journals.

2.3 Cash Receipts and Till Rolls (Immediate Cash Transactions)

A. Cash Receipt
  • Purpose: Written acknowledgment confirming immediate payment in cash or by card/electronic transfer.
  • Source for Recording: Records immediate cash/bank income or expense.
B. Till Roll
  • Purpose: A printed summary of all direct cash and card sales generated by an electronic point-of-sale terminal or cash register.
  • Source for Recording: Used to enter daily cash and card takings into the cash book.

2.4 Petty Cash Vouchers

  • Purpose: An internal document used to record small, minor cash disbursements (e.g., tea, postage, bus fare).
  • Details Included: Date, reason for expenditure, amount, and authorisation signature.
  • Source for Recording: Used to record payments in the Petty Cash Book.

2.5 Banking Documents and Bank Statements

A. Cheque Counterfoil (Stub)
  • Purpose: The retained part of a chequebook recording payments made by cheque.
  • Source for Recording: Records bank payments in the Cash Book.
B. Paying-in Slip Counterfoil
  • Purpose: The stamped stub returned by the bank when cash or cheques are deposited into the account.
  • Source for Recording: Records bank receipts in the Cash Book.
C. Bank Statement
  • Purpose: Periodic summary provided by the bank showing all movements in the bank account.
  • Source for Recording: Acts as the primary source document for direct debits, standing orders, credit transfers, bank charges, interest, and dishonoured cheques.

2.6 Statement of Account

  • Purpose: A summary sent by a seller to a credit customer at the end of a period (usually monthly).
  • Content: Lists all invoices, credit notes, payments received, and the closing balance owed.
  • Accounting Role: It is a check/reconciliation document rather than a book-of-prime-entry source document.

2.7 Journal Voucher

  • Purpose: An internal document giving written authorisation for non-routine transactions.
  • Source for Recording: Used to support entries made in the General Journal (e.g., purchase/sale of non-current assets on credit, correction of errors, opening entries).

3. Analysing and Preparing Source Documents

As an accountant, you must be able to quickly read a source document and identify the core information needed for recording.

3.1 Essential Information on Source Documents

Every reliable source document must include at least the following details:

  1. Date of the transaction.
  2. Name and address of the issuing party (seller) and the receiving party (buyer).
  3. A unique Document Number (e.g., Invoice No. 401).
  4. A clear Description of the goods or services.
  5. The Total Amount (including unit prices, quantities, and trade discounts where applicable).

3.2 Importance in Accounting

  • Verifiability: Documents provide objective proof of every transaction for auditors and tax authorities.
  • Accuracy: Source documents ensure the correct amount, date, and party names are transferred into accounting records.
  • Traceability: If an error arises in the ledgers, it can be traced directly back to the original source document.

3.3 Common Errors to Avoid

Mistake The Fix
Confusing an Invoice with a Receipt. An Invoice is for credit transactions (payment due later). A Receipt is proof of immediate payment.
Confusing a Debit Note with a Credit Note. A Debit Note is sent by the buyer to request a reduction; a Credit Note is issued by the seller to confirm the reduction.
Confusing a Sales Invoice with a Purchase Invoice. We issue a Sales Invoice (customer owes us). We receive a Purchase Invoice (we owe supplier).

Final Key Takeaway: Source documents form the evidentiary foundation of all book-keeping records, ensuring accuracy and accountability across the financial statements.