Personal Guaranty on a Credit Application: How Suppliers Collect From the Owner When the Contractor Won’t Pay (2026)
✓ Verified against state statutes · Reviewed November 2026 · By Michael Evan — Founder · 50 states · 799 rules
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Key Takeaways
→ It gets you past the LLC. When the contractor’s company is broke, the guaranty lets you sue the person who signed. → Writing and signature are required by the statute of frauds in every state. → “John Smith, President” is the trap. Use a separate guaranty signature line, signed individually, with no title. → Don’t require the spouse’s signature if the applicant qualifies on its own (12 C.F.R. § 1002.7(d)). → Use both tools. The guaranty reaches the owner’s personal assets. The lien reaches the project property. A lumber yard opens an account for a framing contractor. The owner fills out the credit application, signs at the bottom, and buys on 30-day terms for two years. Then a big job goes bad. The account sits at $67,000 past due, the contractor’s LLC stops answering, and the yard learns the company has nothing but a few unpaid receivables. The yard’s collections manager pulls the credit application. Below the trade references there is a paragraph that starts “In consideration of credit extended, the undersigned personally guarantees…” That paragraph may be worth more than everything else in the file. If it holds up, the yard can sue the owner personally and collect from personal bank accounts, real estate, and other assets that the LLC never owned. This guide covers when those guaranties hold up, the defenses owners raise, and how a guaranty fits with a supplier’s lien and bond rights. It is part of The Mechanics Lien Management Method: protect the project-level claim with preliminary notice and a timely lien, and use the guaranty to reach the person behind the company. If the owner moved company assets to avoid paying, see the companion guide, Fraudulent Transfer Claims for Unpaid Contractors.
What a Personal Guaranty Does
A guaranty is a promise to pay someone else’s debt if that person doesn’t. California’s definition is the classic one: a guarantor is one who promises to answer for the debt, default, or miscarriage of another (Cal. Civ. Code § 2787). On a credit application, the “another” is the contracting company and the guarantor is usually its owner. Without a guaranty, an LLC or corporation’s debts are generally the company’s alone. To reach the owner you would need a harder theory, such as piercing the corporate veil, a fraudulent transfer claim, or a construction trust fund statute that makes officers liable for diverted funds. With a valid guaranty, you skip all of that and sue on a contract. Guaranty of payment You can go straight to the guarantor when the company doesn’t pay. Most supplier forms are written this way, often saying the guarantor is liable “as a primary obligor.” Guaranty of collection You generally have to try to collect from the company first, often to the point of an unsatisfied judgment. That is slower, so check which kind your form says.
Rule One: It Must Be in Writing and Signed
Every state’s statute of frauds covers a “special promise to answer for the debt, default, or miscarriage of another.” Such a promise can’t be enforced unless it, or a memorandum of it, is in writing and signed by the person being held to it. A phone call where the owner says “don’t worry, I’ll make sure you’re paid” usually isn’t enough. State Statute of frauds for guaranties California: Cal. Civ. Code § 1624(a)(2) (exceptions in § 2794). Texas: Tex. Bus. & Com. Code § 26.01(b)(2). New York: N.Y. Gen. Oblig. Law § 5-701(a)(2). Illinois: 740 ILCS 80/1. Florida: Fla. Stat. § 725.01. There are narrow exceptions. California, for example, treats some promises as the promisor’s own original obligation that need not be in writing (Cal. Civ. Code § 2794). Many states recognize a similar “main purpose” or “leading object” exception, where the promisor made the promise mainly for their own business benefit. Don’t build a collection plan on an exception. Get the signature.
The “I Signed as President” Defense
This is where most guaranty cases are won or lost. The owner signed once, at the bottom of the form, with a title: “Jane Doe, Owner/President.” Their lawyer argues that the signature bound only the company. A guaranty by the company of its own debt would add nothing, so on that reading there is no personal guaranty at all. Courts look at the whole document to decide what the signer meant, and results vary by state and by form. The factors that tend to help the supplier: A separate guaranty section with its own heading and its own signature line, apart from the application signature. “Individually” or “personally” printed under the guarantor’s signature line, with no space for a title. Personal identifiers: the guarantor’s home address, and date of birth or Social Security number collected for a personal credit check, with a permissible purpose. Clear guaranty language that names the guarantor as personally liable for all amounts owed by the company. A second signature when the same person signs for the company and as guarantor. Two signatures in two capacities is the cleanest result. If your current form has one signature line, fix it now for new accounts and get updated forms signed by existing customers at the next credit review. A form problem discovered during a $67,000 collection is too late to fix.
Spousal Signatures and Regulation B
Suppliers sometimes ask the owner’s spouse to co-sign the guaranty to reach jointly owned assets. Federal law limits that. Under the Equal Credit Opportunity Act’s Regulation B, a creditor “shall not require the signature of an applicant’s spouse” on any credit instrument if the applicant qualifies under the creditor’s standards for the credit requested ( 12 C.F.R. § 1002.7(d)(1)). If the applicant doesn’t qualify alone, the creditor may request a cosigner or guarantor. The spouse may serve, but the creditor “shall not require that the spouse be the additional party” (§ 1002.7(d)(5)). There are limited exceptions for signatures needed to reach jointly owned or community property, and for secured credit (§ 1002.7(d)(2)–(4)). Spouses who were required to sign have raised Regulation B as a defense to their guaranties. Courts have split on whether a guarantor counts as an “applicant” who can use it, and the U.S. Supreme Court divided 4–4 on that question in 2016, leaving the split in place. The safe practice is to judge the applicant on its own credit, ask for an additional guarantor only when the file needs one, and let the customer choose who it is. In community property states (AZ, CA, ID, LA, NV, NM, TX, WA, WI), whether one spouse’s guaranty reaches community assets is a state-law question, so ask counsel.
Continuing Guaranties, Revocation, and Other Defenses
Most credit-application guaranties are continuing guaranties. They cover every future purchase on the account, not just the first order. That is what lets a two-year-old form cover this year’s balance. The flip side is revocation: a guarantor can usually end the guaranty for future credit by written notice, and a former owner who sold out will argue that they did. Revocation generally doesn’t erase debts already owed when the notice arrived. Keep every letter a customer sends, and flag the account when ownership changes. Other defenses that come up: Material change without consent. Under traditional suretyship rules, a big change to the underlying deal can discharge a guarantor who didn’t agree to it. Examples include a much larger credit limit, a new entity on the account, or extended terms. Many forms include a waiver of these defenses, which most states enforce for commercial guaranties. Wrong debtor. The guaranty covers “ABC Framing, LLC,” but invoices went to “ABC Framing & Drywall, Inc.” Keep the account name matched to the entity that signed. Missing pages. If the guaranty terms are on a back page or a website the guarantor never saw, expect a fight. Keep the full signed document, including electronic signature records. Amount disputes. Service charges and attorney’s fees are recoverable only if the application or guaranty provides for them and they comply with state usury and interest rules.
Guaranty vs. Lien vs. Bond Claim: Use All Three
Personal guaranty Mechanics lien Payment bond claim Reaches The guarantor’s personal assets The improved private property The surety, mostly on public jobs Covers The whole account, across all jobs One project at a time One bonded project Deadline Years (written contract period) Days or months, plus notices Days to a year, plus notices Weak spot Guarantor may have no assets or file bankruptcy Strict notice and filing rules Remote-tier suppliers may be excluded A guaranty covers the whole running balance, across every job the customer bought for. That makes it valuable for suppliers who can’t track every project. It doesn’t replace project-level rights, though. If the guarantor is judgment-proof or files personal bankruptcy, the lien or bond claim is what pays. Miss the deadline and you lose your lien rights entirely. See lien rights for suppliers and payment bond claims. The guaranty also has a longer clock. It is a written contract, so the state’s written-contract limitations period usually applies. Check yours in Breach of Contract Statute of Limitations by State. Claims for the sale of goods against the buyer itself may fall under the UCC’s 4-year period, § 2-725.
When the Contractor Files Bankruptcy
The automatic stay generally protects only the debtor that filed. If the contractor’s LLC files Chapter 7 or 11, a supplier can usually still sue the owner on the personal guaranty. Courts have extended the stay to non-debtors only in unusual situations, such as when the guarantor’s liability is so tied to a Chapter 11 reorganization that suing them would harm the estate. If the owner files personal bankruptcy, the stay covers them too, and the guaranty becomes a claim in their case. See Mechanics Liens and the Bankruptcy Automatic Stay for the project-side rules.
How to Collect on a Guaranty: Step by Step
Pull the signed original and check the guaranty against the entity on the account, the signature line, and any revocation letters. Protect project rights at the same time. Serve preliminary notices and calculate lien and bond deadlines for every open job with the Mechanics Lien Management State System. Send one demand to both. Address the demand to the company and to the guarantor personally, at the home address on the application. See our construction payment demand letter template. Sue the company and the guarantor together, in the venue the application names. Include the fee and service-charge clauses in the claim. Collect the judgment against the guarantor’s personal assets: judgment liens on real estate, bank levies, and garnishment where allowed. See How to Collect a Judgment by State. For a smaller balance, check whether small claims court is an option. Some states require a business plaintiff to appear through a lawyer.
Common Mistakes
1. Relying on the guaranty and skipping notices Guarantors go broke too. A supplier that skipped preliminary notice has nothing left if the owner files personal bankruptcy. 2. One signature line with a title field It invites the capacity defense. Use a separate personal guaranty block signed individually. 3. Requiring the spouse by default It can violate Regulation B and hand the spouse a defense. Ask for extra guarantors only when the credit file needs them. 4. Ignoring ownership changes When the guarantor sells out, get a new application and guaranty from the new owner before extending more credit.
Frequently Asked Questions
Is a personal guaranty on a credit application enforceable?
Usually, yes, if it is in writing, signed by the guarantor, and clearly shows the signer agreed to be personally liable. Every state's statute of frauds requires a promise to answer for the debt of another to be in writing and signed by the person being held to it, for example Cal. Civ. Code section 1624(a)(2), Tex. Bus. & Com. Code section 26.01, N.Y. General Obligations Law section 5-701, 740 ILCS 80/1, and Fla. Stat. section 725.01. Most fights are not about whether guaranties work, but whether this signature created one.
What if the owner signed the credit application with their title, like "President"?
That is the most common defense. A signature followed by a corporate title can be read as signing only for the company, which would make the company the only debtor. Courts look at the whole document: whether the guaranty language says the signer is personally liable, whether there is a separate guaranty signature line, whether it says "individually," and whether the signer gave a home address or Social Security number. The safest form has a separate guaranty section with its own signature line and no title.
Can a supplier require the owner's spouse to sign the guaranty?
Generally no, if the applicant qualifies on its own. Federal Regulation B, 12 C.F.R. section 1002.7(d), says a creditor shall not require the signature of an applicant's spouse on a credit instrument if the applicant qualifies under the creditor's standards. If an extra guarantor is needed, the creditor may ask for one but may not require that it be the spouse. There are narrow exceptions for secured credit and community property.
Does the guaranty cover purchases made after the guarantor leaves the company?
Often, yes. Many credit-application guaranties are continuing guaranties that cover all future purchases until revoked. A guarantor who sells their interest or leaves usually has to send written revocation to the supplier, following any notice terms in the guaranty. Revocation generally cuts off liability for new credit, not for debts already owed.
Can I sue the guarantor if I missed my mechanics lien deadline?
Yes. A guaranty is a separate contract claim against the guarantor, and it does not depend on lien rights. It is usually governed by the state's statute of limitations for written contracts, which is measured in years, not the lien deadline, which is measured in days or months. The guaranty does not give you a claim against the project property, though. Only the lien or bond claim does that.
Does the company's bankruptcy stop me from suing the guarantor?
Generally no. The automatic stay protects the company that filed, not its owners who personally guaranteed its debts. A supplier can usually sue the guarantor while the company is in bankruptcy. Courts occasionally extend the stay in unusual cases, and the guarantor may file bankruptcy too, so check before you file.
What should a supplier credit application include?
At minimum: the legal name and entity type of the buyer, a separate personal guaranty section signed individually, the payment terms, a service charge or interest clause, an attorney's fee clause, a venue clause, permission to check credit, a statement that the guaranty is continuing, and a waiver of suretyship defenses where the state allows it. Collect job information with each order so you can serve preliminary notices on time.