Whether extrinsic evidence may be considered to clarify ambiguous essential terms in a memorandum offered to satisfy the statute of frauds.
Holding
Yes. Extrinsic evidence is admissible to explain or clarify ambiguous terms in a signed memorandum, so long as the memorandum itself includes the essential terms and the evidence establishes them with reasonable certainty.
Reasoning
Civil Code section 1624 requires a signed writing, note, or memorandum for a contract to sell real property, but it does not require a fully integrated written contract. A memorandum performs an evidentiary function: it must identify the agreement's subject matter, show that a contract was made, and state essential terms with reasonable certainty. The statute is distinct from the parol-evidence rule, which governs the effect of an integrated written agreement.
The Court reaffirmed earlier authority permitting courts to read a memorandum in light of the transaction and surrounding circumstances. In Preble, extrinsic evidence identified an imprecisely described parcel; in Brewer, evidence explained cryptic telegrams sufficiently to establish the parties, subject matter, and terms. These cases reflect the rule that a term is certain when it can be made certain.
The Court disapproved contrary statements in California decisions suggesting that a memorandum's sufficiency must be determined from the writing alone, without any resort to parol evidence. A rigid no-extrinsic-evidence rule does not advance the statute's central purpose: preventing fraudulent enforcement of contracts never made, rather than supplying parties with a technical escape from obligations they actually undertook.
Extrinsic evidence has an important limit. It may clarify an essential term that the memorandum contains but expresses imperfectly; it cannot supply an essential term entirely omitted from the memorandum or prove an agreement that contradicts the memorandum's terms. Conflicts in the explanatory evidence ordinarily go to the trier of fact, but whether the evidence establishes the essential terms with reasonable certainty remains a question of law for the court.