Attachment
The point at which a security interest becomes enforceable against the debtor as to the collateral. Under Tex. Bus. & Com. Code § 9.203, attachment requires three elements: value given by the secured party, the debtor having rights in the collateral, and (typically) authentication of a security agreement describing the collateral. Distinct from perfection, which establishes priority against third parties.
Attachment is the point at which a security interest becomes enforceable against the debtor as to the collateral. Attachment is the threshold event in any secured transaction, without attachment, no security interest exists, and questions of perfection, priority, and enforcement do not arise. Texas adopts the Uniform Commercial Code framework with limited non-uniform variations.
Three elements of attachment
Under § 9.203, a security interest attaches to collateral when (1) value has been given by the secured party, typically a loan, extension of credit, or pre-existing claim; (2) the debtor has rights in the collateral or the power to transfer rights to the secured party, meaning the debtor must own the collateral or have authority to encumber it; and (3) one of four further conditions is satisfied: (a) the debtor authenticates a security agreement describing the collateral; (b) the secured party has possession of the collateral pursuant to security agreement; (c) the secured party has control of certain types of collateral (deposit accounts, electronic chattel paper, investment property, letter-of-credit rights); or (d) the collateral is a certificated security in registered form delivered to the secured party under § 8.301 pursuant to the security agreement.
The composite-document doctrine
The "security agreement" requirement is satisfied by any record that the debtor authenticates and that contains a description of the collateral sufficient to reasonably identify it. Many courts apply a composite-document approach, under which multiple authenticated records read together can satisfy the security-agreement requirement even if no single document contains all the elements. A financing statement alone is insufficient; it can serve as part of a composite security agreement only if it is authenticated by the debtor and contains the description of collateral.
Attachment vs. perfection
Attachment makes the security interest enforceable between debtor and secured party. Perfection is a separate, additional step that establishes priority against third parties, other secured creditors, lien creditors, and bankruptcy trustees. A security interest can be attached but unperfected, in which case it binds the debtor but loses priority disputes against perfected creditors and the trustee in bankruptcy. A security interest cannot be perfected before it attaches, but a financing statement may be filed before attachment, and the interest is then perfected when it attaches. § 9.308(a); § 9.502(d).
After-acquired property
Section 9.204 permits security agreements to cover after-acquired collateral. The security interest in after-acquired collateral attaches automatically when the debtor acquires rights in that property, assuming the security agreement contains an after-acquired property clause and the other attachment requirements are satisfied. Common exclusions: consumer goods (with narrow exceptions) and commercial tort claims (an after-acquired property clause does not reach them).
Proceeds attachment
Under § 9.203(f) and § 9.315(a)(2), a security interest attaches automatically to identifiable proceeds of collateral. If a debtor sells inventory subject to a security interest, the security interest follows the proceeds (cash, accounts receivable, replacement goods) without separate attachment. Tracking proceeds and maintaining their identifiability is a practical challenge in commingled accounts.
Attachment questions tend to surface in bankruptcy and priority disputes. Each element maps to something in a lender's file: an authenticated security agreement with a sufficient collateral description, evidence of the value given, the debtor's rights in the collateral (particularly for after-acquired property), any after-acquired property clause, and the date of attachment, which matters for priority and preference analysis. Failure of any element means the secured party is an unsecured creditor.