This text summarizes and explains the fundamental law applicable to a broad variety of current payment systems. Coverage includes issues of liability, transfer, holder in due course status, and check collection applicable to negotiable instruments (checks, notes, drafts) governed by UCC Articles 3 and 4, as well as letters of credit and documents of title governed by UCC Articles 5 and 7. The text further examines the rights, obligations, and federal protection applicable to credit and debit cards. Finally, this title addresses recent legal developments in regard to a variety of electronic fund transfers, prepaid cards and digital currencies.