Financial Services Act 2013: The primary legislation governing financial institutions in Malaysia, including banking transactions and money transfers. It provides the regulatory framework for authorization of financial transactions.

Anti-Money Laundering, Anti-Terrorism Financing and Proceeds of Unlawful Activities Act 2001: Ensures the transfer authorization complies with AML regulations and includes necessary declarations about the source and purpose of funds.

Contracts Act 1950: Provides the legal framework for creating valid authorization documents, ensuring the letter meets basic contract law requirements including offer, acceptance, and consideration.

Central Bank of Malaysia Act 2009: Establishes Bank Negara Malaysia's authority over financial transactions and its requirements for domestic and international transfers.

Powers of Attorney Act 1949: Relevant for understanding the legal framework of authorization and delegation of financial powers to another person.

Exchange Control Act 1953: Governs the transfer of money, particularly for international transfers, and sets requirements for currency exchange and cross-border transactions.