Employment Act (Chapter 91): Primary legislation governing employment relationships in Singapore, covering notice period requirements, statutory minimums for termination procedures, and employee protections in termination situations.

Contract Act (Chapter 53): Fundamental legislation governing contract law in Singapore, including principles of contract termination, cancellation, and the requirements for valid contract dissolution.

Civil Law Act (Chapter 43): Legislation establishing general principles governing contractual relationships and requirements for written notices in Singapore's civil law system.

Electronic Transactions Act (Chapter 88): Legislation governing the validity and requirements of electronic communications and transactions, relevant if the termination cancellation letter is delivered electronically.

Companies Act (Chapter 50): Corporate law framework relevant when termination involves corporate entities, including requirements for corporate authorization and documentation.

Industry-Specific Regulations: Sector-specific regulations that may apply depending on the industry (e.g., MAS regulations for financial services, IMDA regulations for telecommunications).

Notice Period Requirements: Statutory and contractual requirements regarding minimum notice periods and proper notification procedures for termination cancellation.

Format Requirements: Legal and procedural requirements regarding the format, content, and structure of termination cancellation letters under Singapore law.

Delivery Requirements: Legal requirements for proper service and delivery of termination cancellation notices, including proof of receipt and documentation.

Record-Keeping Obligations: Requirements for maintaining proper documentation and records of the termination cancellation process for legal compliance and future reference.