Basic Uniform Commercial Code
A security interest attaches when value is given, the debtor has rights over the collateral he is providing, and one of the requirements from UCC § 9-203(b)(3) is met, usually the one requiring an authenticated security agreement. UCC § 9-203(b).
- Control is not required. A security agreement can also attach to such goods.
UCC § 9-203(b)(3)(B)–(D) do not require a writing.