Uniform Commercial Code (UCC): Primary state law governing commercial transactions, particularly Article 9 (Secured Transactions), Article 2 (Sales), and Article 3 (Negotiable Instruments). Critical for establishing rights and obligations in receivables transfers.

Federal Assignment of Claims Act: Federal law governing the assignment of claims against the United States government, crucial if any receivables involve federal contracts.

Fair Debt Collection Practices Act (FDCPA): Federal law regulating debt collection practices, essential when dealing with consumer receivables and their collection.

Fair Credit Reporting Act (FCRA): Federal law governing the collection, dissemination, and use of consumer credit information, relevant for consumer receivables.

Truth in Lending Act (TILA): Federal law requiring disclosure of key terms and costs in consumer credit transactions, important for consumer receivables.

State-Specific Laws: Including state versions of UCC, usury laws, consumer protection laws, and licensing requirements for debt buyers/collectors specific to each state.

Securities Laws: Including Securities Act of 1933 and Securities Exchange Act of 1934, relevant if the receivables transfer involves securitization.

Bankruptcy Code: Federal law governing bankruptcy proceedings, particularly provisions regarding assignment of claims and true sale considerations.

Tax Laws: Internal Revenue Code provisions and state tax implications affecting the transfer of receivables and their tax treatment.

Privacy Laws: Including Gramm-Leach-Bliley Act and state privacy laws, governing the handling of personal and financial information.

Financial Industry Regulations: Including Bank Secrecy Act and Anti-Money Laundering regulations, crucial for financial institution compliance.

Industry-Specific Regulations: Specialized regulations such as HIPAA for medical receivables or government contracts regulations, depending on the nature of the receivables.