Basic Uniform Commercial Code

Instrument

UCC § 9-102(a)(47)

"Instrument" means a negotiable instrument or any other writing that evidences a right to the payment of a monetary obligation, is not itself a security agreement or lease, and is of a type that in ordinary course of business is transferred by delivery with any necessary indorsement or assignment. The term does not include

  1. investment property,
  2. letters of credit, or
  3. writings that evidence a right to payment arising out of the use of a credit or charge card or information contained on or for use with the card.
Copyright, The American Law Institute

E.g., checks, CDs, etc.