In re Google RTB Consumer Privacy Litigation

CourtDistrict Court, N.D. California
DecidedJanuary 3, 2025
Docket4:21-cv-02155
StatusUnknown

This text of In re Google RTB Consumer Privacy Litigation (In re Google RTB Consumer Privacy Litigation) is published on Counsel Stack Legal Research, covering District Court, N.D. California primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
In re Google RTB Consumer Privacy Litigation, (N.D. Cal. 2025).

Opinion

1 2 3 4 UNITED STATES DISTRICT COURT 5 NORTHERN DISTRICT OF CALIFORNIA 6 7 IN RE GOOGLE RTB CONSUMER Case No. 21-cv-02155-YGR (VKD) PRIVACY LITIGATION 8 ORDER DENYING PLAINTIFFS' MOTION FOR CONTEMPT AND 9 SPOLIATION SANCTIONS RE NAMED PLAINTIFFS DATA 10 (REDACTED) 11 Re: Dkt. No. 697 12 13 Plaintiffs move for an order finding defendant Google LLC (“Google”) in contempt of the 14 Court’s previous discovery orders (Dkt. Nos. 487, 524) and sanctioning Google for spoliating 15 evidence, contending that Google failed to preserve and produce certain data relating to the named 16 plaintiffs. Dkt. No. 697. Google opposes the motion, both on the merits and on the ground that it 17 is untimely. Dkt. No. 708. Having considered the parties’ briefing and arguments at the hearing 18 (Dkt. No. 714), the Court denies plaintiffs’ motion for contempt and sanctions. 19 I. BACKGROUND 20 On July 29, 2022, the parties filed a discovery dispute letter in which plaintiffs asked the 21 Court to order Google to produce information regarding how Google links information it discloses 22 through RTB with an account holder’s Google account and what information is linked. Dkt. No. 23 269 at 2. Specifically, plaintiffs argued that “Google is purposefully withholding evidence that 24 Google’s internal systems link the information that Google sends through RTB with the Named 25 Plaintiff’s Google account. This linkage renders information disclosed through RTB personal 26 information.” Id. at 2-3 (emphasis in original). On August 26, 2022, the Court issued an order 27 resolving this dispute. Dkt. No. 314 at 4-5. The order states in relevant part: Plaintiffs’ premise is that if Google associates information with an 1 account holder, the information is “personal” to the account holder 2 because of that association. They seem to say that if such information is disclosed in an RTB auction, it is “personal 3 information” of an account holder within the scope of discovery. The parties’ arguments on this point are not well-developed. In 4 particular, the Court is not persuaded that if an item of information Google associates with an account holder is shared with an RTB 5 participant in a manner that (a) eliminates the association with a 6 specific account holder and (b) does not allow the RTB participant to make the same association (see “cookie matching” discussion 7 below), Google has necessarily shared “personal information” of an account holder with an RTB participant. If plaintiffs contend 8 otherwise, they have not pointed the Court to any authority that supports their position. 9 The Court expects Google to produce documents sufficient to show, 10 for each named plaintiff, what information specific to that plaintiff 11 was shared with an RTB participant and the details of such sharing. If Google discloses information that allows an RTB participant to 12 identify an account holder based on information the participant may have about that account holder, Google must produce records 13 showing the disclosure of that information as well. Otherwise, 14 plaintiffs have not shown they are entitled to discovery of all information Google maintains about an account holder solely based 15 on Google’s internal linking of information with an account holder. 16 Id. (emphasis added in second paragraph).1 17 On February 28, 2023, plaintiffs filed a motion seeking sanctions against Google. Dkt. No. 18 431. As relevant here, plaintiffs argued that Google “intentionally stripped out” data fields that 19 would identify the named plaintiffs whose data they produced, making it difficult for plaintiffs to 20 know which data is associated with a particular named plaintiff and to match later productions 21 with earlier productions. Id. at 5. Specifically, plaintiffs claimed that Google deliberately omitted 22 from its production the Google Account ID and Google User ID data fields, and the “joining keys” 23 that link the two. Id. at 5-6. Google responded that it produced the named plaintiffs data using a 24 unique “query ID” field that allowed plaintiffs to match prior productions with later productions of 25 samples of named plaintiffs data. Dkt. No. 448 at 12. The Court held a hearing on the motion. 26 Dkt. No. 478. On April 14, 2023, the Court denied plaintiffs’ motion for sanctions. Dkt. No. 487. 27 1 The order states in relevant part: 2 The Court agrees with Google that [the Court’s] prior orders did not specify how Google should produce data so that earlier productions 3 can easily be matched with later productions. However, to the 4 extent Google’s productions from multiple different data sources cannot be easily matched up based on the query ID, as plaintiffs 5 contend in their reply, Google’s reliance solely on the query ID needlessly burdens plaintiffs. 6 Accordingly, while Google’s most recent data productions did not 7 violate any directive in the Court’s prior orders, Google must take 8 care that all of its productions of named plaintiffs data can be easily correlated, and it must include the fields necessary to accomplish 9 that result. During the hearing, Google acknowledged that it could include the Google Account ID, Google User ID, and “joining keys” 10 without undue burden, and the Court expects that it will do so, including remedying its prior productions that omit this information. 11 12 Id. at 6-7. In a separate order issued the same day, the Court permitted plaintiffs to select six 13 additional time periods for samples of named plaintiffs data that Google would be required to 14 produce and ordered plaintiffs to “promptly advise Google of their selection.” See Dkt. No. 483 at 15 2. 16 Shortly thereafter, the parties filed another discovery dispute letter regarding Google’s 17 compliance with the portion of the Court’s April 14, 2023 order requiring Google to produce “the 18 Google Account ID, Google User ID, and ‘joining keys’”. Dkt. No. 503. Plaintiffs complained 19 that Google agreed to produce the Google Account ID (or ) data field but refused to 20 produce the Google User ID or “joining keys.” Id. at 1, 4. Google responded that because it 21 the “Google User ID,” it could not produce this data field, and that (contrary to the Court’s 22 statements summarizing Google’s position) no “joining keys” link the Google Account ID and the 23 Google User ID. Id. at 5-6. The Court held a hearing on this dispute and issued an order on May 24 16, 2023. Dkt. No. 510 (sealed); Dkt. No. 524 (public). The order states in relevant part: 25 From the parties’ presentations at the May 16, 2023 hearing, the 26 Court now understands the following: Google maintains Google User ID which it calls the . The 27 includes an 1 . That 2 is populated in a data field called google_user_id.” Google google_user_id field that is 3 transmitted as part of a bid request. Google does log the and an . 4 However, 5 6 7 8 With respect to “joining keys,” the Court understands that plaintiffs 9 use this term to refer to the internal mechanisms by which Google links a Google Account ID (or ) and a . Google 10 says . 11 The Court accepts Google’s representation that the 12 google_user_id data field that is shared with RTB participants and therefore cannot be produced to plaintiffs. However, the 13 Court now appreciates that there is a different but related data item, the , that Google maintains internally, 14 15 . During the hearing, the Court inquired whether Google could produce 16 , together with the Google Account ID (or ), for all sampled named plaintiffs data that the Court has 17 previously ordered Google to produce, even though Google contends that the is never shared with RTB participants. 18 Google’s counsel indicated he would need to investigate that 19 possibility. 20 The Court also accepts Google’s representation that it .

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Bluebook (online)
In re Google RTB Consumer Privacy Litigation, Counsel Stack Legal Research, https://law.counselstack.com/opinion/in-re-google-rtb-consumer-privacy-litigation-cand-2025.