Yeh v. Twitter CA1/5

CourtCalifornia Court of Appeal
DecidedJanuary 7, 2026
DocketA170843
StatusUnpublished

This text of Yeh v. Twitter CA1/5 (Yeh v. Twitter CA1/5) is published on Counsel Stack Legal Research, covering California Court of Appeal primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Yeh v. Twitter CA1/5, (Cal. Ct. App. 2026).

Opinion

Filed 1/7/26 Yeh v. Twitter CA1/5 NOT TO BE PUBLISHED IN OFFICIAL REPORTS California Rules of Court, rule 8.1115(a), prohibits courts and parties from citing or relying on opinions not certified for publication or ordered published, except as specified by rule 8.1115(b). This opinion has not been certified for publication or ordered published for purposes of rule 8.1115.

IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA

FIRST APPELLATE DISTRICT

DIVISION FIVE

HENRY YEH, Plaintiff and Appellant, A170843 v. TWITTER, INC., (City & County of San Francisco Defendant and Respondent. Super. Ct. No. CGC23605100)

This is an appeal from a judgment of dismissal after the trial court sustained the demurrer of defendant, Twitter, Inc. (Twitter),1 to the class action complaint of plaintiff, Henry Yeh, without leave to amend. The trial court found that plaintiff failed to allege facts sufficient to state a valid claim for breach of express or implied contract; violation of the Unfair Competition Law (UCL; Bus. & Prof. Code, § 17200 et seq.); or unjust enrichment. The court further found that it was not reasonably probable that plaintiff could cure these defects if given the opportunity and, thus, dismissed the lawsuit. We agree and, thus, affirm.

1 X Corp. is the successor in interest to Twitter. To avoid confusion and for ease of reference, we refer to Twitter, as the named defendant, rather than to X Corp.

1 FACTUAL AND PROCEDURAL BACKGROUND The following facts are taken from the complaint.2 I. The Parties. Twitter is a Delaware corporation with its principal place of business in San Francisco, California. Twitter “operates an online communication service through its website . . . and through text messaging and mobile applications.” This service allows “registered users to communicate with one another by posting ‘tweets,’ or short messages,” with which “other users may interact through a ‘like,’ reply, or ‘retweet.’ ” “[T]o follow other accounts, or post, like, and retweet tweets, users must register for a Twitter account.” During the relevant time period, from May 2013 to September 2019, a user was required to provide either “an email address or phone number” in order to register for a Twitter account. (Boldface omitted.) If a registered

2 We grant Twitter’s unopposed motion to take judicial notice of the

following documents previously judicially noticed by the trial court: (1) Twitter’s terms of service; (2) Twitter’s privacy policy (Privacy Policy); (3) the Federal Trade Commission (FTC) complaint; (4) the federal district court’s order granting Twitter’s motion to dismiss in Price v. Twitter, Inc. (N.D. Cal., 2022, No. 3:22-cv-0373-SK) (Price); and (5) the transcript of the hearing on the Price motion to dismiss. (Arce v. Kaiser Foundation Health Plan, Inc. (2010) 181 Cal.App.4th 471, 482 [“We must take judicial notice of matters properly noticed by the trial court”].) We also grant Twitter’s unopposed motion to take judicial notice of five documents consisting of filings and orders in the related federal actions of Gianakopoulos v. Twitter, Inc. (N.D. Cal., complaint filed 2022, No. 3:22-cv-04674-AGT) (Gianakopoulos); McClellan v. Twitter, Inc. (N.D. Cal., complaint filed 2022, No. 3:22-cv-04758-TSH) (McClellan); and Price. (See Jane Doe No. 1 v. Uber Technologies, Inc. (2022) 79 Cal.App.5th 410, 415, fn. 1 [taking judicial notice of documents filed in federal lawsuit “alleging facts very similar to those alleged here”]; Van Zant v. Apple Inc. (2014) 229 Cal.App.4th 965, 969 & fn. 2 [taking judicial notice of “three of the MDL plaintiffs’ master complaints” in related federal action].) All other requests for judicial notice are denied as irrelevant to our resolution of the issues raised herein.

2 user sought to enable one of Twitter’s security features, such as two-factor authentication (also called login verification) or account recovery, the user was asked to add either an email address or a phone number for the account. Nonregistered users, however, could access certain limited Twitter services, “such as searching and viewing public Twitter profiles,” without providing any contact information. Plaintiff, a resident of South San Francisco, maintained an active Twitter account during the relevant time period for which he “provided his telephone number and email address to Twitter for the purposes of login verification and account recovery.” II. Twitter’s Business Model. Twitter’s services are free for registered users such as plaintiff. However, Twitter’s “core business model monetizes user information by using it for advertising.” In fact, advertising is, by far, the largest source of Twitter’s revenue, accounting for $2.99 billion of its total revenue of $3.4 billion. Twitter provides advertising in the form of promoted tweets, accounts, or trends. Twitter also provides two advertising services, “ ‘Tailored Audiences’ ” and “ ‘Partner Audiences,’ ” to its advertising partners. Tailored Audiences allows advertisers to “target specific groups of Twitter users by matching the telephone numbers and email addresses that Twitter collects to the advertisers’ existing lists of telephone numbers and email addresses.” Partner Audiences allows advertisers to import marketing lists from data

3 brokers to “match against the lists of telephone numbers and email addresses collected by Twitter.”3 According to plaintiff, from at least May 2013 to September 2019, Twitter “misrepresented” to registered users “the extent to which it maintained and protected the security and privacy of their Personal Information.” Specifically, while Twitter “prompted users to provide a telephone number or email address for the express purpose of securing or authenticating their Twitter accounts,” it “also used this information to serve targeted advertising and further its own business interests through its Tailored Audiences and Partner Audiences services.” Plaintiff further alleged that “[he] valued his telephone number and email address and would not have provided them to Twitter without receiving value in exchange had he known this Personal Information would be used for marketing purposes, rather than for the login verification and account recovery purposes Twitter touted.” III. Twitter’s Terms of Service and Privacy Policy. Twitter users agreed to and were bound by Twitter’s terms of service and its incorporated Privacy Policy.4 The Privacy Policy informed users: “We use your contact information, such as your email address or phone number, to authenticate your account and keep it—and our services—secure, and to help prevent spam, fraud, and abuse. We also use contact information to personalize our services, enable certain account features (for example, for login verification or Twitter via

3 According to the complaint, Twitter “has provided advertisers the

ability to match against lists of email addresses since January 2014 and lists of telephone numbers since September 2014.” 4 The Privacy Policy is attached to the complaint as exhibit 1.

4 SMS), and to send you information about our services. If you provide us with your phone number, you agree to receive text messages from Twitter to that number as your country’s laws allow. Twitter also uses your contact information to market to you as your country’s laws allow, and to help others find your account if your settings permit, including through third-party services and client applications. You can use your settings for email and mobile notifications to control notifications you receive from Twitter. You can also unsubscribe from a notification by following the instructions contained within the notification or here.” (Privacy Policy, § 1.3, boldface omitted.) Elsewhere, the Privacy Policy explained to users that it “use[s] the information described in this Privacy Policy to help make our advertising more relevant . . .

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Yeh v. Twitter CA1/5, Counsel Stack Legal Research, https://law.counselstack.com/opinion/yeh-v-twitter-ca15-calctapp-2026.