You authorize a vendor to start work, accept repeated deliveries, or keep requesting services after a written agreement expires. Later, an invoice arrives, and you object: “I never signed anything.” That may not resolve the dispute. An implied contract in California can arise from conduct rather than a signed document. For California businesses and individuals, understanding the difference between an actual agreement and a disputed payment demand can help prevent expensive misunderstandings.
Implied contract: California rules for unsigned deals
California Civil Code § 1621 defines an implied contract as one whose existence and terms are manifested by conduct. This article concerns implied-in-fact contracts—actual agreements inferred from conduct—as distinct from implied-in-law obligations or restitution remedies. By comparison, an express contract has terms stated in words, whether spoken or written, under Civil Code § 1620. A signature is therefore not the only way to agree.
An implied-in-fact contract still requires the essentials of a contract, including consent and consideration. Civil Code § 1550 identifies the basic requirements. The question is whether the parties’ actions objectively show an agreement, not whether one party privately hoped to be paid.
For example, a business regularly orders maintenance services, grants the technician access, approves completed work, and pays the same hourly rate. If it requests another visit without signing a new agreement, that conduct may support a contractual payment obligation.
- Requests: Who asked for the goods or services, and what did they request?
- Knowledge: Did the recipient know payment was expected?
- Prior dealings: Had the parties previously agreed on prices or paid similar invoices?
- Acceptance: Did the recipient approve, use, or retain the requested work?
A review of your business contracts and contracting practices can identify where conduct may create obligations beyond the documents you signed.
An implied agreement is not the same as restitution
An implied-in-fact contract rests on actual agreement inferred from conduct. An obligation sometimes described as “implied in law” is different: it concerns restitution rather than an agreement the parties actually made.
For services, quantum meruit may provide recovery of their reasonable value when no enforceable contract governs the compensation at issue. The claimant must establish an express or implied request for the services, a benefit to the recipient, and circumstances supporting a reasonable expectation of payment. Receiving a benefit alone does not automatically create liability. If an enforceable express or implied-in-fact contract governs the same compensation, recovery generally proceeds under that contract rather than quantum meruit.
Consider a consultant who sends an unsolicited report and then demands a fee. The recipient’s receipt of the report does not necessarily establish consent. Contrast that with a company that asks the consultant to prepare the report, supplies information, and uses the completed analysis while knowing the consultant expects payment.
The distinction affects what must be proved and how compensation is measured. An invoice is evidence of a demand; it is not, by itself, proof that the recipient agreed to every charge.
When California law still requires a writing
Conduct cannot always replace a required writing. California’s statute of frauds, Civil Code § 1624, requires certain agreements to be memorialized in a writing subscribed by the party to be charged, subject to applicable exceptions.
Examples include certain agreements involving interests in real property, agreements that by their terms cannot be performed within one year, and promises to answer for another person’s debt. The precise category and any exception require careful analysis.
Other transactions have separate rules. California Commercial Code § 2201 generally requires a sufficient writing for sales of goods priced at $500 or more, with specified exceptions. Emails and electronic records may matter, but whether they satisfy the relevant requirements depends on their content and authentication.
Do not assume that accepting work necessarily makes every proposed term enforceable. Arbitration clauses, liability limits, late fees, and renewal provisions each require a basis for finding agreement. Performance under an expired contract may support some continuing obligations without automatically reviving every provision.
What matters when an unsigned deal becomes a dispute
Preserve evidence before memories fade or messages disappear. Useful records include:
- Emails, text messages, proposals, and purchase orders.
- Invoices, payment records, and prior billing objections.
- Delivery receipts, access records, and work approvals.
- Notes identifying who authorized the work and their authority.
- Communications about scope, price, cancellation, or disputed extras.
Separate the disputed questions. The parties might agree that services were requested but disagree about the rate, hours, or whether additional work was authorized. A court may find an obligation without accepting the full amount demanded.
Timing also matters. California Code of Civil Procedure § 339(1) generally provides a two-year limitations period for an action on a contract, obligation, or liability not founded on a written instrument. Section 337(a) generally provides four years for an action founded on a written instrument. These periods are subject to statutory exceptions—including California Commercial Code § 2725 for sales-of-goods claims—and applicable accrual, tolling, and contractual-limitations rules. Mixed written and conduct-based arrangements, as well as mixed goods-and-services transactions, require closer analysis; the claim’s label alone does not decide the deadline.
Reduce uncertainty before work starts
A short written confirmation can prevent a much larger dispute. Before performance begins, identify the parties, scope, price or pricing method, payment timing, and who may approve changes.
- Confirm authorization. Specify which people may place orders or approve extra work.
- Document changes. Record revised scope and fees before the additional work proceeds.
- Address expiration. State whether services stop or continue, and on what terms.
- Object promptly. Explain disputed charges in writing rather than relying on silence.
These steps help both the party providing services and the party paying for them. They also make it easier to distinguish an agreed obligation from an unsupported demand.
Talk to a California business attorney
If an unsigned arrangement has led to a payment dispute, Itkin Law offers a free consultation for businesses and individuals to discuss the agreement, available evidence, and possible next steps. Schedule a free consultation or call (424) 603-8888.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. The law changes, and this article reflects the law as of its publication date. Every situation is different — contact us to discuss how the law applies to your exact circumstances. See our full disclaimer.
