Registration of Deeds Act (Chapter 269): Primary legislation governing the registration of legal documents and deeds in Singapore. Essential for ensuring the legal validity of name change documentation.

National Registration Act (Chapter 201): Core legislation that regulates identity registration and changes to personal particulars in Singapore. Provides the legal framework for name change procedures with the Immigration and Checkpoints Authority (ICA).

ICA Guidelines on Name Changes: Administrative guidelines that specify requirements for name change applications, including necessary documentation and procedural steps for processing name change requests.

Supreme Court of Judicature Act: Legislation relevant in cases where court approval is required for name changes, particularly in complex cases or those requiring judicial oversight.

Commissioner for Oaths Act: Legislation governing the attestation and verification of documents, particularly relevant for the authentication of name change authorization letters.

Personal Data Protection Act 2012 (PDPA): Legislation that governs the collection, use, and disclosure of personal data in Singapore, ensuring proper handling of personal information in name change documentation.

Electronic Transactions Act: Legislation that provides the legal framework for electronic transactions and digital signatures, relevant if the authorization letter needs to be executed electronically.