Record-Breaking GDPR Fine: McDonald's Poland Case Exposes Critical Gaps in Processor Due Diligence
The Polish Data Protection Authority (UODO) has delivered a stark reminder about the importance of processor oversight with its record-breaking fine against McDonald's Polska Sp. z o.o. The €3.8 million penalty, alongside additional sanctions against the data processor, represents one of Poland's most significant GDPR enforcement actions and offers crucial lessons for organizations worldwide.
The Incident: When Employee Data Goes Public
The case centered on a data breach involving McDonald's employee information that was exposed through a shift scheduling system managed by external processor 24/7 Communication Sp. z o.o. The compromised data included highly sensitive information such as:
- Employee names and contact details
- PESEL numbers (Polish national identification numbers)
- Passport numbers
- Working hours and schedules
- Job titles and employment information
The breach occurred when employee data ended up exposed on a publicly accessible server, making it available to unauthorized parties. This wasn't just a technical glitch—it represented a fundamental failure in the data protection framework between controller and processor.

The Penalties: A Multi-Layered Response
UODO's response was comprehensive, targeting both parties involved:
McDonald's Polska (Controller):
- Fine: €3,804,054 (approximately 16.1 million PLN)
- Formal reprimand
24/7 Communication (Processor):
- Fine: Approximately €43,000 (183,000 PLN)
- Formal reprimand
Notably, while the controller received the larger absolute fine (€3.8 million representing just 0.18% of annual turnover), the processor faced a more severe relative penalty at 1.19% of its annual revenue.

The Root Causes: Where Due Diligence Failed
The UODO investigation revealed multiple critical failures in McDonald's approach to processor oversight:
1. Inadequate Risk Analysis
Despite having a data processing agreement in place, McDonald's failed to conduct proper risk analysis before entrusting sensitive employee data to the external processor. The company didn't adequately assess whether 24/7 Communication had the technical and organizational capabilities to protect such sensitive information.
2. Missing Technical and Organizational Measures
Basic security safeguards were lacking throughout the processing arrangement. The investigation found that fundamental protections weren't implemented or verified, leaving employee data vulnerable.
3. DPO Consultation Failure
The Data Protection Officer wasn't properly consulted during the processor selection and oversight process—a critical oversight given the sensitive nature of the data involved.
4. Sub-processor Issues
A sub-processor was involved in the data processing without a valid subcontracting agreement, creating additional layers of risk and compliance failures.
5. Data Minimization Problems
The investigation revealed that PESEL numbers were being used unnecessarily in the system. Only after the breach did McDonald's replace these sensitive identifiers with internal ID numbers—a change that should have been implemented from the start.

The Broader Implications: Lessons for All Controllers
This case establishes several critical precedents for GDPR compliance:
Controllers Remain Fully Responsible
The fine reinforces that outsourcing data processing doesn't transfer liability. Controllers maintain full responsibility for ensuring their processors can adequately protect personal data. A signed data processing agreement is just the starting point, not the end goal.
Enhanced Due Diligence Requirements
When processing sensitive data like national ID numbers or passport information, standard vendor questionnaires and basic assessments are insufficient. Organizations must:
- Conduct thorough technical security assessments
- Verify processors' actual security implementations
- Involve IT and security teams in vendor evaluation
- Maintain ongoing oversight throughout the relationship
The High Cost of Sensitive Data Exposure
The substantial fine reflects the serious nature of exposing highly sensitive identifiers like PESEL numbers, which can be used for identity theft and fraud. Organizations processing similar data face heightened regulatory scrutiny and potential penalties.

Industry Impact and Regulatory Trends
This case fits into a broader pattern of increasing GDPR enforcement across Europe, with regulators focusing particularly on:
- Processor relationships: Ensuring controllers properly vet and oversee their data processors
- Sensitive data protection: Imposing higher standards when processing government IDs, financial information, or other high-risk data categories
- Technical security measures: Requiring demonstrable security implementations, not just policy documents
The Polish authority's approach of fining both controller and processor sends a clear message that all parties in the data processing chain face potential liability.
Practical Recommendations
Organizations should immediately review their processor relationships and implement these safeguards:
Before Engaging Processors:
- Conduct comprehensive security assessments beyond standard questionnaires
- Verify technical implementations through audits or certifications
- Ensure DPO involvement in vendor selection for high-risk processing
- Assess data minimization opportunities to reduce risk exposure
During Ongoing Relationships:
- Implement regular security reviews and assessments
- Monitor processor security practices continuously
- Maintain clear subcontracting agreements for any sub-processors
- Conduct periodic risk reassessments
For Sensitive Data Processing:
- Apply enhanced security standards proportionate to data sensitivity
- Consider additional safeguards like encryption and access controls
- Implement strict data minimization practices
- Ensure proper incident response planning

Looking Forward: The Evolution of GDPR Enforcement
The McDonald's case represents a maturing of GDPR enforcement, moving beyond simple compliance checklists to examine the substance of data protection practices. Regulators are increasingly sophisticated in their analysis of controller-processor relationships and expect organizations to demonstrate genuine, ongoing due diligence.
For multinational corporations and local businesses alike, this case serves as a crucial reminder that data protection compliance requires active, ongoing management—not just signed contracts and good intentions. In an era where data breaches can expose millions of individuals and result in multi-million euro fines, the cost of inadequate processor oversight has never been clearer.
The message from Poland's data protection authority is unambiguous: controllers must take full ownership of their data protection responsibilities, regardless of which third parties they engage to help fulfill them. In the world of GDPR compliance, there are no shortcuts to proper due diligence.