Which of the following is NOT a requirement for attachment of a security interest?

The requirement for a security interest to attach includes three key elements: an authenticated security agreement, value given by the secured party, and the debtor having rights in the collateral. The authenticated security agreement is essential, as it provides a record of the agreement between the secured party and the debtor regarding the collateral. Value must also be given, establishing the consideration for the security interest, and there must be an assurance that the debtor has rights in the collateral to ensure that the security interest is enforceable.

While consent from the debtor is often a practical reality in transactions involving a security interest, it is not strictly a legal requirement for attachment under the Uniform Commercial Code (UCC). This means that a security interest can be attached even without explicit consent as long as the other conditions are met. Therefore, selecting the option suggesting that debtor's consent is required for attachment identifies it as the best answer to the question of what is not a requirement for attachment of a security interest.