Agency Law: Includes state-specific agency laws, common law principles of agency relationships, and Restatement (Third) of Agency. These govern the fundamental relationship between the authorizer and authorized party.

Power of Attorney Laws: Encompasses the Uniform Power of Attorney Act (where adopted) and state-specific power of attorney statutes that regulate the delegation of authority.

Privacy Laws: Includes HIPAA (medical), FERPA (educational), and Gramm-Leach-Bliley Act (financial) - relevant depending on the authorization's purpose and the type of information being shared.

State-Specific Requirements: Covers notarization requirements, witness requirements, format and content requirements, and duration limitations specific to the state where the authorization will be used.

Capacity Laws: Addresses mental capacity requirements, age of majority requirements, and state-specific capacity definitions that determine who can legally grant authorization.

Authentication Requirements: Covers requirements for valid signatures, including electronic signature laws such as ESIGN Act and UETA (Uniform Electronic Transactions Act).

Liability Considerations: Encompasses scope of authority, fiduciary duties, and limitations of liability that need to be clearly defined in the authorization letter.