A guaranty exists to make somebody other than the primary debtor personally liable for an obligation. The owner of a closely-held business signs a personal guaranty so a vendor will extend trade credit to the business. A parent company signs a corporate guaranty to get a lender to fund a subsidiary. Or a spouse signs one before a landlord will lease commercial space to a startup. The guaranty is what made the underlying transaction possible. And when the underlying obligation defaults, the guaranty is what gives the creditor a real recovery path.
Texas guaranty law has accumulated a substantial body of doctrine. The statute of frauds requirement. The distinction between guarantor and surety. The defenses available to guarantors when the underlying obligation has been altered. The interaction between guaranty enforcement and foreclosure or other collateral realization. Each of these affects whether a particular guaranty case is winnable, and on what theory.
This page covers the framework for Texas guaranty enforcement and defense.
The Texas statute of frauds for guaranties
Texas Business and Commerce Code section 26.01(b)(2) requires guaranties to be in writing signed by the party charged. The provision is one of the original statute of frauds categories and remains a meaningful threshold defense for guarantors.
What the writing must contain:
- A clear identification of the principal obligation being guaranteed.
- Language manifesting the promisor’s intent to be answerable for the debt or obligation of another.
- The signature of the guarantor (or an authorized agent).
What the writing does not need to contain:
- All terms of the underlying obligation (those can be incorporated by reference or established through extrinsic evidence).
- A specific recital of consideration (although the consideration for the guaranty has to exist).
The exception to the statute of frauds is the “main purpose” or “leading object” doctrine. When the main purpose of the guaranty is to benefit the promisor personally, not just to support a third party’s debt, Texas courts have enforced oral guaranties. But the doctrine is narrow and fact-intensive. Relying on it to enforce an oral guaranty is a hard posture.
Guarantor versus surety
Texas distinguishes between guarantors and sureties, and the distinction has substantive consequences.
A guarantor is secondarily liable. The creditor must generally proceed first against the principal obligor before pursuing the guarantor, unless the guaranty waives this requirement. Most modern commercial guaranties expressly waive prior pursuit and make the guarantor liable as a primary obligor regardless of any effort against the principal.
A surety is primarily liable. The creditor can proceed directly against the surety without first exhausting remedies against the principal. Modern usage often treats the terms as interchangeable, but the legal distinction persists.
Absolute versus conditional guaranties. An absolute guaranty makes the guarantor liable on default of the principal regardless of the creditor’s efforts to collect from the principal. A conditional guaranty makes liability contingent on specified conditions, typically the exhaustion of remedies against the principal. Modern commercial guaranties are usually absolute and unconditional, with broad waivers of defenses.
The interpretation matters because the categorization controls what the creditor must do before pursuing the guarantor and what defenses the guarantor can raise.
Common guarantor defenses
Guarantor defenses fall into several categories:
Defenses going to formation. No valid guaranty was ever created. The statute of frauds was not satisfied. The guarantor lacked capacity. Consideration was missing. The guaranty was fraudulently induced.
Defenses going to modification of the underlying obligation. Material alteration of the principal obligation without the guarantor’s consent generally releases the guarantor, at least to the extent of the change. The alteration must be material; minor modifications do not release.
Defenses going to release of the principal or collateral. Release of the principal obligor by the creditor may release the guarantor. Release of collateral that secured the principal obligation reduces the guarantor’s liability pro tanto. These defenses are commonly waived in modern guaranty forms.
Defenses going to conduct toward collateral. When the secured debt is partially satisfied by sale of collateral, commercial reasonableness questions arise. UCC Article 9 requires commercial reasonableness in secured party dispositions. Bad faith or commercially unreasonable foreclosure conduct can reduce the guarantor’s deficiency exposure.
Defenses going to limitations. Texas guaranty claims have a four-year limitations period under section 16.004(a)(1) of the Civil Practice and Remedies Code. The clock generally starts when the principal defaults and the guarantor’s obligation matures.
Waiver issues. Many of these defenses can be waived in the guaranty itself. Modern commercial guaranties contain extensive waiver provisions. Courts generally enforce express waivers between sophisticated parties.
Deficiency claims after foreclosure
A common posture: secured debt is partially satisfied by foreclosure of collateral, and the creditor pursues the guarantor for the remaining deficiency.
Texas law imposes fair value protections in some deficiency actions. Texas Property Code section 51.003 provides fair value offset rights in residential real property deficiency cases. Section 51.005 contains certain commercial deficiency protections when the debt is secured by Texas real property and the trustee sale occurred under the deed of trust.
The fair value mechanism allows a guarantor (or other party liable for the deficiency) to require the court to determine the fair market value of the foreclosed property and to credit that value against the deficiency calculation, rather than just the sale price. This is meaningful in undervalued sale situations.
The mechanism is procedurally demanding. The fair value claim must be pleaded within strict deadlines and supported by competent evidence. Guarantors who do not preserve the fair value defense lose it.
Strategy for enforcement
When enforcing a guaranty, the creditor’s analysis runs through several questions:
Was the guaranty properly executed? Get the original. Confirm the signature and any required corporate authorizations.
What does the guaranty cover? Read the guaranty carefully. Some guaranties cover only the original obligation; others extend to all future obligations of the principal. Some are limited in amount; others are unlimited.
What conditions to enforcement does the guaranty impose? Most modern guaranties waive prior pursuit of the principal, but not all. Confirm what the guaranty requires before pursuing.
What about collateral? If the principal obligation is secured, the creditor needs to coordinate the secured remedy with the guaranty claim. Improper conduct toward the collateral can defeat or reduce the guaranty recovery.
Where is the guarantor’s solvent? A guaranty against an insolvent guarantor is not worth pursuing. Run the asset investigation before suit, not after.
Strategy for defense
The guarantor defense playbook:
Read the guaranty. Many guaranty defendants discover at first review that the guaranty does not cover the claimed obligation, or covers it only in part. The first read often shapes the rest of the defense.
Look for material alteration. Modifications to the underlying loan or obligation made without the guarantor’s consent are recurring defense theories.
Develop the foreclosure conduct record. In deficiency cases, the lender’s foreclosure process is often the strongest defense ground. Notice deficiencies, commercial unreasonableness, and bad faith conduct all provide defenses.
Preserve fair value rights early. The procedural deadlines for fair value claims are short. Missing them forfeits the defense.
Consider counterclaim exposure. When the creditor has overreached wrongful foreclosure, lender liability theories, fraudulent inducement claims, the guarantor case can flip from defense to offense.
Where these cases connect to other practices
Guaranty enforcement and defense cases overlap with:
- Promissory note litigation. Guaranties usually secure underlying note obligations. See Promissory Note Litigation.
- Foreclosure. Deficiency claims follow real property foreclosures. See our Foreclosure practice.
- Collections. Money judgments on guaranty cases connect to the firm’s Texas Collections practice.
- Fraudulent transfer. Guarantors who move assets to defeat enforcement raise fraudulent transfer questions. See our Dallas Fraudulent Transfer practice.
Where guaranty cases turn
We start with the guaranty document, because misreading it wastes motion on both sides. We coordinate enforcement with any secured remedies, since pursuing the guaranty without lining it up against the foreclosure conduct creates needless defense exposure. We calendar the fair-value defenses, because missing those deadlines forfeits them outright. And we pursue Chapter 38 fees on the guaranty claim, which most written guaranties qualify for.
Guarantors often lose on the waiver language before the suit even starts. Whether you are enforcing a guaranty or defending one, the wording of the document is where this gets decided, so start there.
Frequently Asked Questions
What is a guaranty under Texas law?
A guaranty is a promise by one party (the guarantor) to be responsible for the obligation of another party (the principal) if the principal fails to perform. Guaranties are common in commercial leases, business loans, vendor extensions of credit, and equipment financing. They allow creditors to look to the personal assets of a guarantor (or to the assets of a parent company guarantor) when the primary obligor defaults.
Do Texas guaranties have to be in writing?
Yes. Under Texas Business and Commerce Code section 26.01(b)(2), a promise to answer for the debt, default, or miscarriage of another is unenforceable unless in a writing signed by the party charged. This is the guaranty provision of the Texas statute of frauds. Oral guaranties generally cannot be enforced. The exception applies when the primary purpose of the promise is to benefit the promisor, not to support the third-party debtor.
What is the difference between a guarantor and a surety in Texas?
A guarantor is secondarily liable, generally the creditor must first proceed against the principal obligor before pursuing the guarantor (unless the guaranty expressly waives this requirement). A surety is primarily liable, the creditor can proceed directly against the surety without first exhausting remedies against the principal. The terms are often used loosely, but the distinction matters when the guaranty has not waived the requirement of prior pursuit against the principal.
What defenses do guarantors have under Texas law?
Several. Material alteration of the underlying obligation without the guarantor's consent generally releases the guarantor. Release of the principal obligor or release of collateral may release the guarantor pro tanto. Failure of consideration for the guaranty. Failure to satisfy specific conditions to enforcement (like prior pursuit of the principal, where the guaranty did not waive this). Statute of limitations. Fraudulent inducement of the guaranty. The defenses available depend heavily on the specific guaranty language.
Can a guarantor be sued for the deficiency after collateral is foreclosed?
Yes, in most cases. When secured debt is partially satisfied by foreclosure of collateral, the creditor can pursue the guarantor for the remaining deficiency. Texas Property Code section 51.003 imposes fair value protections in residential deficiency actions and section 51.005 contains certain commercial protections. Guarantor defenses based on improper foreclosure conduct, including bad faith and commercial unreasonableness, are common in deficiency cases.