The Informal Invoice is a widely used document in South African business operations, particularly among small businesses, freelancers, and companies conducting straightforward transactions. This document type serves as a less formal alternative to a full tax invoice while still maintaining essential business documentation requirements. It typically includes basic information such as supplier details, customer information, description of goods or services, pricing, and payment terms. While more flexible than formal invoices, an Informal Invoice must still comply with South African business practices and basic tax requirements, though it may not meet full VAT documentation standards. This document type is particularly useful for non-VAT registered businesses, small-scale transactions, and situations where a simplified billing format is appropriate while maintaining professional standards.

1. Invoice Header: Contains invoice number, date, and 'INVOICE' clearly marked

2. Supplier Details: Business name, address, contact information, and registration/VAT numbers if applicable

3. Customer Details: Client's name, billing address, and contact information

4. Item Description: Clear description of goods/services provided

5. Pricing Details: Unit prices, quantities, and total amount

6. Payment Information: Total amount due, payment terms, and banking details

7. Additional Notes: Any essential notes about the transaction