Contract Law (Chapter 53): Primary legislation governing formation and enforcement of contracts in Singapore, essential for the basic validity of the invoice confirmation letter
Sale of Goods Act (Chapter 393): Regulates transactions involving the sale of goods, including terms of sale and delivery obligations
Goods and Services Tax Act (Chapter 117A): Governs GST requirements and tax obligations that must be reflected in invoice documentation
Electronic Transactions Act (Chapter 88): Provides legal framework for electronic documents and signatures if the confirmation is issued electronically
Companies Act (Chapter 50): Sets out requirements for business documentation and corporate compliance in Singapore
Evidence Act (Chapter 97): Governs the admissibility of business records and documents as evidence in legal proceedings
Limitation Act: Establishes time limits for enforcing payment claims and legal actions related to invoice disputes
IRAS Guidelines: Inland Revenue Authority of Singapore's specific requirements for tax documentation and invoice formatting
ACRA Guidelines: Accounting and Corporate Regulatory Authority's requirements for business documentation and record-keeping
Banking Regulations: Relevant for payment terms and banking-related aspects of invoice transactions
