Contracts Act (Cap. 2): Primary legislation governing contract formation, validity, and enforceability in Singapore. Essential for ensuring the affirmation letter meets basic contractual requirements.

Evidence Act (Cap. 97): Governs the admissibility of evidence, including written declarations and affirmations, in Singapore courts.

Electronic Transactions Act: Regulates electronic documents and signatures, relevant if the affirmation letter is to be executed electronically.

Contract Formation Rules: Legal principles regarding offer, acceptance, consideration, and intention to create legal relations.

Oaths and Declarations Act (Cap. 211): Governs the making of statutory declarations and affirmations in Singapore.

Supreme Court of Judicature Act: Provides the legal framework for court proceedings and enforcement of legal documents.

Rules of Court 2021: Current procedural rules governing court proceedings and legal documentation in Singapore.

Legal Capacity Requirements: Rules regarding who can legally make affirmations, including age and mental capacity requirements.

Clear Intention Requirement: Legal principle requiring clear demonstration of parties' intention to be legally bound by the affirmation.

Form Requirements: Specific requirements for document format, including clear language, proper party identification, date, place, and signature requirements.