2019
By 2019, EU-US Privacy Shield was showing signs of the legal vulnerabilities that would lead to its July 2020 invalidation. The Data Protection Commissioner of Ireland—the lead supervisory authority for Facebook, Google, and other major US tech companies' EU operations—had referred cases challenging Standard Contractual Clauses and Privacy Shield to the Court of Justice of the European Union. Max Schrems' legal challenges were advancing through the system. For compliance professionals paying attention, the writing on the wall was clear: Privacy Shield was living on borrowed time.
For organizations that acted on the 2019 warning signs—building alternative transfer mechanisms, conducting transfer impact assessments, and reducing US data transfer dependencies—the July 2020 Schrems II ruling was manageable. For those that maintained full reliance on Privacy Shield without contingency planning, the ruling created a compliance crisis. Understanding how 2019's warning signals mapped to 2020's enforcement reality is instructive for reading current data transfer risk signals.
Privacy Shield's Background
Privacy Shield replaced Safe Harbor in July 2016, following the Schrems I ruling that invalidated Safe Harbor in October 2015. The replacement was designed to address the concerns the CJEU had identified: inadequate protection against US government surveillance of EU personal data. Privacy Shield included an Ombudsperson mechanism, annual review commitments, and enhanced substantive privacy protections for participating US companies.
The Schrems organization and European privacy advocates immediately challenged Privacy Shield as inadequate. The criticism was specific: the Ombudsperson mechanism was not sufficiently independent of the US executive branch to provide the judicial-style remedy that EU fundamental rights law required. The surveillance programs revealed by Snowden—PRISM, UPSTREAM, and others—remained in place under US law. The fundamental tension between EU fundamental rights and US surveillance law had not been resolved.
The EU Article 29 Working Party (predecessor to the EDPB) issued statements questioning Privacy Shield's adequacy and calling for review. The European Parliament passed resolutions calling for suspension of Privacy Shield pending resolution of its legal vulnerabilities. These were not subtle signals—they were explicit statements by authoritative EU data protection bodies that Privacy Shield's legal foundation was contested.
The 2019 Warning Signs Intensify
In 2019, the legal risk materialized into concrete proceedings. The Irish Data Protection Commissioner, acting on the Schrems III complaint regarding Facebook's data transfers, referred the case to the CJEU with questions about both SCCs and Privacy Shield's validity. This referral—known as the Data Protection Commissioner vs. Facebook Ireland case—put both transfer mechanisms before the EU's highest court.
The AG Opinion in the case, published in December 2019, gave a preview of the legal direction: the Advocate General found that SCCs could be valid when accompanied by additional safeguards, but raised concerns about mechanisms that couldn't provide effective protection against US surveillance. The opinion didn't directly address Privacy Shield, but the legal framework it applied was potentially as problematic for Privacy Shield as for the specific SCC scenario.
US surveillance law developments in 2019 added to the risk. Reauthorization of Section 702 of the Foreign Intelligence Surveillance Act—the legal basis for PRISM and other mass surveillance programs—without significant reform demonstrated that the US surveillance framework that Schrems I had found inadequate remained substantially unchanged. The legal basis for challenging Privacy Shield's adequacy was as strong in 2019 as it had been in 2016.
Immediate Impact: Compliance Forward-Planners Diversify
Organizations that read the 2019 signals and acted took specific steps:
- SCC reviews and enhancement: organizations reviewed their SCC implementations and added supplementary technical and contractual safeguards
- Transfer impact assessment development: organizations began developing transfer impact assessment frameworks before they were required
- Data minimization in US transfers: organizations reviewed which data categories they were transferring to US processors and reduced non-essential transfers
- EU-only architecture options: organizations evaluated whether specific workloads could be served from EU-only infrastructure, eliminating US transfer dependencies
- Alternative transfer mechanism identification: for transfers that remained necessary, organizations identified whether additional mechanisms beyond Privacy Shield could be documented
Lessons Learned: Legal Risk Signals Should Drive Contingency Planning
The 2019 Privacy Shield situation is a case study in risk signals that were visible, credible, and adequately warning of the disruption that occurred. Organizations that treated the 2019 legal challenges as noise rather than signal made compliance decisions based on an optimistic assumption—that Privacy Shield would survive legal challenge—that proved incorrect.
The lesson is not that organizations should panic at every legal challenge to data transfer mechanisms. It is that when authoritative legal bodies (the CJEU AG, national DPAs, the European Parliament) are consistently raising concerns about a transfer mechanism's legal validity, organizations should maintain contingency plans. Single-mechanism reliance on any data transfer tool creates fragility; multi-mechanism compliance programs are inherently more resilient.
Evolution: Post-Schrems II and the DPF
The July 2020 Schrems II ruling invalidated Privacy Shield as expected, creating the compliance crisis that 2019 warning signs had forecast. Organizations that had prepared alternate mechanisms transitioned smoothly; those that hadn't scrambled. The 2023 EU-US Data Privacy Framework represents the third attempt to resolve the EU-US transfer mechanism challenge, with Schrems already signaling intent to challenge it as well.
The pattern is clear: EU-US data transfer mechanisms operate under ongoing legal risk. The EU fundamental rights framework and US surveillance law are in genuine tension that policy tools have not fully resolved. Organizations building resilient data transfer compliance programs design for this risk rather than betting on any single mechanism's permanence.
The Outpace Approach: EU Data Transfer Risk Assessment
Outpace Professional Services conducts EU data transfer risk assessments that evaluate current transfer mechanisms, identify concentration risks (over-reliance on any single mechanism), and design resilient multi-mechanism programs. For clients using Privacy Shield-era SCC frameworks that weren't updated for Schrems II requirements, we assess compliance gaps and design remediation.
Our assessments are grounded in current legal reality—not the optimistic interpretation of current mechanisms but an honest evaluation of their legal durability and the contingency plans required to maintain compliance when mechanisms are challenged or invalidated.
The Risk Management Imperative
Data transfer compliance is a risk management exercise, not a one-time certification. Mechanisms are challenged; legal frameworks evolve; regulators issue guidance that changes the compliance landscape. Organizations that treat data transfer compliance as requiring ongoing monitoring and contingency planning are better positioned for the inevitable changes than those that assume current mechanisms are permanent.
💡 Ready for an EU data transfer risk assessment? Outpace Professional Services evaluates your current transfer mechanisms, identifies legal vulnerabilities, and designs resilient compliance programs that maintain data transfer capability regardless of how specific mechanism challenges resolve.
