UCC Article 9 Definitions and Secured Transaction Terms

UCC Article 9 governs secured transactions in personal property, and its definitions are the shared vocabulary every lender, borrower, and lawyer uses to describe who is involved, what the collateral is, and when a security interest becomes enforceable. Section 9-102 alone carries more than 80 defined terms, with additional definitions scattered through § 1-201 and the operative sections of Article 9. Every state has adopted a version of Article 9, so these terms function the same way across jurisdictions. The definitions below are the ones that come up in nearly every transaction, grouped by how they relate to each other rather than listed alphabetically.

The Parties

Three roles appear in almost every Article 9 deal. The debtor is the person or entity that owns or has rights in the collateral. The obligor is whoever actually owes the money or must perform the underlying obligation. The two are often the same person, but they split apart when someone pledges property to back another person’s debt. A parent who puts up equipment to secure a child’s business loan is the debtor; the child is the obligor.¹

The secured party is the lender or seller holding the security interest. Correct identification of these parties in the transaction documents matters, because a financing statement filed with a misspelled debtor name can be ineffective and cost the secured party priority.¹

Security Interest, Security Agreement, and Collateral

A security interest is an interest in personal property or fixtures that secures payment or performance of an obligation. The definition sits in UCC § 1-201(b)(35), and the concept drives everything else in Article 9.²

The security agreement is the contract that creates the security interest. It must be authenticated by the debtor and must describe the collateral. The property covered by the agreement is collateral, defined in § 9-102(a)(12) as the property subject to the security interest. Collateral also includes proceeds and certain sold receivables.¹

Article 9 replaces the older concept of a “signature” with authentication. Under § 9-102(a)(7), authenticating a record means either signing it or, with the intent to adopt it, attaching an electronic sound, symbol, or process to it. This is what makes electronic security agreements and financing statements work.¹

Describing the Collateral

Section 9-108 says the security agreement must describe the collateral well enough that a reasonable person can figure out what is covered. Acceptable methods include a specific listing, a category, a UCC-defined type, a quantity, or a formula. A blanket description like “all the debtor’s assets” is not sufficient in the security agreement itself, even though that same supergeneric language works in a financing statement filed for public notice.³

Two categories demand more. A commercial tort claim cannot be described merely by type; the specific claim must be identified. In consumer transactions, consumer goods, security entitlements, securities accounts, and commodity accounts also need more than a type-only description.³

Tangible Collateral: The Four Categories of Goods

Physical property falls under goods, defined in § 9-102(a)(44) as all things that are movable when the security interest attaches. The definition also sweeps in fixtures, standing timber to be cut, unborn animals, growing crops, and manufactured homes. Goods are then divided into four mutually exclusive categories based on how the debtor uses them. The category controls how a lender perfects and enforces its interest.¹

Consumer goods: property used primarily for personal, family, or household purposes. A car driven to work, living-room furniture, a home refrigerator.
Inventory: goods held for sale or lease, plus raw materials and work in progress. Vehicles on a dealer’s lot, lumber at a building supply store, parts on a factory assembly line.
Farm products: crops, livestock, and farming supplies in the possession of someone engaged in farming, as long as the goods remain unmanufactured. Once a farmer sells milk to a dairy processor, the milk stops being a farm product.
Equipment: the residual category. Any goods that don’t fit the other three definitions are equipment by default. Office desks, manufacturing machinery, company delivery vehicles.

Classification depends on who owns the property and how they use it, not on the item itself. A pickup truck is a consumer good in your driveway, equipment in a plumber’s fleet, and inventory on a dealer’s lot. Getting the category wrong in the security agreement can create perfection problems, since consumer goods allow automatic perfection for purchase-money interests while most other categories require filing.¹

Fixtures and Accessions

Fixtures are goods that have become so attached to real property that they are treated as part of it under local law, yet Article 9 still allows a security interest in them. A commercial HVAC system bolted to a building or an elevator installed in a warehouse is a fixture. Section 9-334 provides special priority rules for fixtures because the security interest may compete with a mortgage. A lender claiming a fixture generally needs a fixture filing in the real-property records, not just a standard UCC filing, to beat the building’s mortgagee.⁴

An accession is a good physically united with another good in a way that doesn’t destroy the original’s identity. A new engine installed in a truck is an accession. The security interest in the engine can continue after installation, but it may be subordinate to another party’s interest in the truck as a whole.¹

Intangible and Semi-Intangible Collateral

Article 9 covers far more than physical property. Each intangible category carries its own perfection and priority rules.

Accounts: a right to payment for property sold, services performed, insurance policies issued, energy provided, or credit-card usage, among other triggers. Accounts receivable are the common example, routinely pledged to secure revolving credit lines.¹
Chattel paper: a record or set of records that evidence both a monetary obligation and a security interest in (or lease of) specific goods. A retail installment contract for a car is chattel paper, because it contains both the buyer’s promise to pay and the dealer’s security interest in the vehicle.¹
Instruments: negotiable instruments and other writings that evidence a right to money and are ordinarily transferred by delivery. Promissory notes are the classic example, and because instruments have a tangible form, perfection by possession is available.¹
Documents: documents of title such as warehouse receipts and bills of lading. They represent the right to receive goods held by a third party, so a security interest in the document effectively controls the underlying goods.¹
General intangibles: the residual category for intangible personal property that doesn’t fit any other definition. Patents, trademarks, copyrights, software, and payment intangibles all land here.¹

Commercial Tort Claims

A commercial tort claim is a tort claim brought by an organization, or by an individual if the claim arose in the course of business and does not involve personal injury or death. These claims sit outside the general-intangibles bucket, so a blanket lien on “all general intangibles” does not capture them. The security agreement must specifically describe the claim, often by referencing the events that gave rise to it or the lawsuit caption. After-acquired-property clauses do not reach commercial tort claims either; if the claim arises after the original agreement, the borrower must consent to an amendment.⁵

Deposit Accounts and Investment Property

A deposit account is a demand, time, savings, passbook, or similar account maintained at a bank. It does not include investment property or accounts evidenced by an instrument. A security interest in a deposit account can only be perfected through control, never by filing a financing statement.⁶

Control over a deposit account happens in one of three ways: the secured party is the bank where the account is held, the bank agrees in writing to follow the secured party’s instructions without needing the debtor’s consent, or the secured party becomes the bank’s customer on the account. The debtor can still use the account day to day while the secured party holds control.⁷

Investment property covers securities, securities accounts, commodity contracts, and commodity accounts. It can be perfected by filing or by control, but control gives superior priority, so lenders almost always pursue it.

Proceeds

When collateral is sold, collected on, damaged, or otherwise disposed of, whatever the debtor receives in exchange is called proceeds. Section 9-102(a)(64) defines proceeds broadly, covering cash from a sale, insurance payments for damaged collateral, and even legal claims arising from interference with the collateral.¹

Under § 9-315, a security interest automatically attaches to identifiable proceeds. If a debtor sells inventory and deposits the payment into a bank account, the secured party’s interest follows the money. The security interest also continues in the original collateral after a sale unless the secured party authorized the disposition free of the lien.⁸

Attachment

A security interest attaches to collateral when it becomes enforceable against the debtor. Section 9-203 requires three things:

Value. The secured party must give value, typically by extending credit or making a loan.
Rights in the collateral. The debtor must have ownership or other rights in the property, or the power to transfer those rights.
Security agreement. The debtor must authenticate a security agreement that describes the collateral, or the secured party must take possession or control of it.

All three must be present. The order does not matter; attachment happens the moment the last element falls into place. Until then, the secured party has no enforceable claim against the collateral, even if a financing statement has already been filed.⁹

Perfection

Perfection is the step that makes the security interest enforceable against third parties, not just the debtor. Section 9-308 requires attachment plus the applicable perfection step, which is usually filing, possession, or control. Without perfection, a secured party can lose its collateral to a bankruptcy trustee or a competing creditor who perfected first.¹⁰

Filing

The most common perfection method is filing a financing statement, often called a UCC-1. It identifies the debtor, the secured party, and the collateral. Unlike the security agreement, the financing statement can use a supergeneric description like “all assets of the debtor.” Filing is the default perfection method for accounts, equipment, inventory, and general intangibles.¹¹

A standard financing statement is effective for five years and must be renewed by a continuation statement before it lapses.

Control and Possession

Some collateral types require or allow alternative methods. A deposit account can only be perfected by control. Money can only be perfected by possession. Instruments and chattel paper may be perfected by filing, but possession gives higher priority. Investment property can be perfected by filing or control, with control winning when priorities compete.⁶

Purchase-Money Security Interest

A purchase-money security interest (PMSI) arises when a lender provides the funds a debtor uses specifically to acquire the collateral, or when a seller extends credit for the purchase price of the goods. Section 9-103 defines the PMSI and the related purchase-money obligation.¹²

Section 9-324 gives PMSIs special priority over conflicting security interests in the same collateral. For goods other than inventory or livestock, a PMSI takes priority if it is perfected when the debtor receives the goods or within 20 days after. For inventory, the PMSI holder must also notify existing secured parties before the debtor takes possession. This priority is what allows equipment sellers and vehicle financers to extend credit even when the borrower already has an existing blanket lien from another lender.¹³

After-Acquired Property and Future Advances

A security agreement can reach property the debtor does not own yet. An after-acquired property clause extends the security interest to collateral the debtor acquires after signing. This is standard in revolving credit facilities where the collateral turns over constantly, such as inventory and accounts receivable.¹⁴

Two limits apply. The clause does not work for consumer goods unless the debtor acquires them within 10 days after the secured party gives value, or the goods are an accession serving as additional security. It also does not reach commercial tort claims. A future advances clause allows the same collateral to secure additional loans made after the original agreement, whether or not the lender was committed to making those advances.¹⁴

Default and Enforcement

Article 9 does not define “default.” The security agreement itself specifies what triggers default: missed payments, breach of a covenant, bankruptcy filing, or anything else the parties agree to. What Article 9 does provide is a detailed set of rules for what happens next. Under § 9-601, the secured party’s post-default remedies are cumulative: sue for a judgment, foreclose on the collateral, or pursue both at once.¹⁵

Commercially Reasonable Disposition

The most common enforcement path is selling the collateral. Section 9-610 requires that every aspect of the sale be commercially reasonable: the method, timing, place, and terms must all pass that test. The secured party can sell at a public auction or through a private sale, as a single lot or in pieces, and either in the collateral’s current condition or after commercially reasonable preparation. The secured party can buy at a public sale, but purchasing at a private sale is only allowed for collateral sold on a recognized market or with widely available standard pricing.¹⁶

Strict Foreclosure

Instead of selling, a secured party can propose to keep the collateral in full or partial satisfaction of the debt. This process, sometimes called strict foreclosure, is governed by § 9-620. The debtor must consent in a signed record after default, and no other secured party or lienholder with an interest in the collateral can object within the required notice period. In a consumer transaction, partial satisfaction is prohibited; the secured party must either propose full satisfaction or sell the collateral.¹⁷

Right of Redemption

Before the secured party completes a sale, enters into a contract to sell, or accepts the collateral in satisfaction of the debt, the debtor (or any secondary obligor or junior lienholder) can redeem the collateral. Redemption requires paying off the full outstanding obligation plus the secured party’s reasonable expenses and attorney’s fees. Partial payment does not qualify.¹⁸

Termination Statements

Once the debt is fully paid, the debtor has the right to clear the public record. Section 9-513 sets different deadlines by collateral type. For consumer goods, the secured party must file a termination statement within one month after the obligation is fully satisfied, without waiting for the debtor to ask. For all other collateral, the secured party must file or send a termination statement within 20 days after receiving a written demand from the debtor. If the secured party ignores the demand, the debtor may file the termination statement directly, and the secured party can be liable for resulting damages.¹⁹

1
Uniform Commercial Code. Uniform Commercial Code 9-102 – Definitions and Index of Definitions
2
Legal Information Institute. UCC 1-201 – General Definitions
3
Legal Information Institute. Uniform Commercial Code 9-108 – Sufficiency of Description
4
Legal Information Institute. Uniform Commercial Code 9-334 – Priority of Security Interests in Fixtures
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Uniform Commercial Code. Uniform Commercial Code 9-108 – Sufficiency of Description
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Legal Information Institute. Uniform Commercial Code 9-312 – Perfection of Security Interests in Chattel Paper, Deposit Accounts, Documents, Goods Covered by Documents, Instruments, Investment Property, Letter-of-Credit Rights, Letters of Credit, Money, or Oil, Gas, or Other Minerals Before Extraction
7
Legal Information Institute. Uniform Commercial Code 9-104 – Control of Deposit Account
8
Legal Information Institute. Uniform Commercial Code 9-315 – Secured Partys Rights on Disposition of Collateral
9
Cornell Law Institute. UCC – Article 9 – Secured Transactions
10
Legal Information Institute. Uniform Commercial Code 9-308 – When Security Interest or Agricultural Lien is Perfected; Continuity of Perfection
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Cornell Law Institute. Uniform Commercial Code 9-310 – When Filing Required to Perfect Security Interest or Agricultural Lien
12
Cornell Law Institute. Uniform Commercial Code 9-103 – Purchase-Money Security Interest; Application of Payments; Burden of Establishing
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Legal Information Institute. Uniform Commercial Code 9-324 – Priority of Purchase-Money Security Interests
14
Legal Information Institute. Uniform Commercial Code 9-204 – After-Acquired Property; Future Advances
15
Legal Information Institute. Uniform Commercial Code 9-601 – Rights After Default; Judicial Enforcement
16
Legal Information Institute. Uniform Commercial Code 9-610 – Disposition of Collateral After Default
17
Legal Information Institute. Uniform Commercial Code 9-620 – Acceptance of Collateral in Full or Partial Satisfaction of Obligation; Compulsory Disposition of Collateral
18
Legal Information Institute. Uniform Commercial Code 9-623 – Right to Redeem Collateral
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Legal Information Institute. Uniform Commercial Code 9-513 – Termination Statement