Universal Consent & Preference Management: From Fragmented Digital Properties to Unified Cross-Channel Compliance

A leading regional grocery retailer had expanded its digital footprint significantly over recent years. The website served as the primary hub for promotions, loyalty programs, and online ordering. Two mobile applications extended that experience to iOS and Android users. But as the digital ecosystem grew, so did the complexity of managing consumer consent across it.

Cookies and tracking scripts had accumulated across properties without a unified governance framework. Consent captured on the website did not carry over to the mobile apps. Customers who opted out in one channel had no guarantee their preferences would be honored in another. And with state privacy regulations tightening, the compliance risk was becoming harder to ignore.

FLLR was engaged to deploy OneTrust's Universal Consent & Preference Management module across the retailer's digital properties, creating a unified consent experience that worked seamlessly across web and mobile while positioning the organization for evolving regulatory requirements.

The Challenge

The retailer's digital consent posture had developed organically, and the gaps were creating both compliance risk and customer experience friction.

Ungoverned Tag Ecosystem

Cookies, tags, and scripts had accumulated across the website without systematic categorization
No clear inventory existed of what was collecting data and for what purpose
The marketing and IT teams lacked visibility into the full scope of tracking technologies deployed

Disconnected Consent Across Channels

Consent captured on the website existed in isolation from the mobile applications
Customers interacting across devices had no continuity in their preference settings
Opt-out requests in one channel did not propagate to others, creating compliance exposure

Mobile App Complexity

Two mobile applications (iOS and Android) required consent management integration
Platform-specific technical challenges, particularly around language display and token configuration, added implementation complexity
Coordination with the mobile development partner was required to ensure proper integration

The Bottom Line

Without unified consent management across web and mobile, the retailer faced regulatory risk that would only increase as privacy laws expanded
Customers expected their preferences to follow them across channels, and the current infrastructure could not deliver that experience

Our Approach

We approached this engagement with a focus on building a consent architecture that would work across every customer touchpoint, not just the website in isolation.

Discovery workshops were conducted to map the retailer's consent use cases and understand how customers interacted across digital properties. A comprehensive cookie scan identified all tags and scripts deployed across the website, establishing the baseline inventory needed for proper categorization and consent management.

The design phase centered on creating a consent model that could scale across one domain and two mobile applications while respecting geo-location requirements for different regulatory jurisdictions. Google Tag Manager served as the integration point, requiring careful configuration to ensure consent signals controlled tag firing behavior correctly.

Cross-device and cross-domain consent presented particular technical challenges. JWT token configuration and coordination with the retailer's mobile development partner were required to ensure preferences captured in one environment would be recognized in others. We committed to working through these complexities until the implementation was fully operational, extending the engagement timeline to ensure nothing was left incomplete.

Implementation

Cookie Scanning and Tag Inventory

A comprehensive cookie scan was conducted across the retailer's primary domain to identify all cookies, tags, and scripts in the digital ecosystem. Each tracking technology was cataloged, categorized, and mapped to appropriate consent purposes. This inventory became the foundation for the consent model, ensuring no tracking technologies operated outside the governance framework.

Consent Model and Preference Center Configuration

The consent model was configured within OneTrust to reflect the retailer's data collection purposes and regulatory requirements. A branded preference center was deployed, giving customers a clear interface to manage their consent choices. Geo-location rules were implemented to ensure the appropriate consent experience was presented based on where customers were accessing the site, supporting compliance with state-specific requirements.

Google Tag Manager Integration

The retailer's GTM container was configured to respect consent signals, ensuring tags only fired when appropriate consent had been obtained. Script categorization mapping was completed to align each tag with its corresponding consent purpose. Preview testing and script validation confirmed proper behavior before deployment, and post-deployment testing verified banner behavior and data collection across environments.

Cross-Device and Cross-Domain Consent

Cross-device and cross-domain consent was implemented across the website and both mobile applications. This required JWT token configuration to establish identity continuity across platforms, enabling consent captured in one environment to be recognized in others. Ongoing collaboration with the mobile development partner ensured the technical integration was properly completed and tested.

Mobile Application Troubleshooting

iOS-specific issues emerged during implementation where language changes were not being properly reflected within the application. Hands-on troubleshooting and guidance were provided to support code configuration adjustments, ensuring accurate display across all environments. Similar support was extended for Android to ensure parity across platforms.

Documentation and Knowledge Transfer

Comprehensive configuration documentation was delivered covering all platform settings, consent model definitions, GTM configurations, and mobile integration details. Knowledge transfer sessions ensured the retailer's team could maintain and extend the implementation independently, supporting long-term sustainability without ongoing external dependency.

Results

Tag Visibility

Before: No systematic inventory of tracking technologies
After: Complete cookie and tag catalog with purpose mapping

Consent Governance

Before: Ungoverned tag firing across properties
After: GTM-controlled consent enforcement based on user preferences

Cross-Channel Consistency

Before: Consent isolated to individual properties
After: Unified consent across 1 domain and 2 mobile applications

Regulatory Readiness

Before: Limited geo-location awareness
After: Geo-rules enforcing jurisdiction-appropriate consent experiences

Customer Experience

Before: Fragmented preference management
After: Branded preference center providing clear, consistent control

Operational Sustainability

Before: Configuration knowledge held by implementation team
After: Full documentation and knowledge transfer for internal ownership

The engagement extended six weeks beyond the original timeline at no additional cost, reflecting FLLR's commitment to ensuring the implementation was fully operational before closure. The retailer now has a consent infrastructure that works seamlessly across their digital ecosystem, with customers able to manage preferences once and have those choices honored everywhere.

The Bigger Picture

Consent management often starts as a website-only concern, with mobile applications added later as separate implementations. The result is a fragmented experience where customers cannot trust that their preferences carry across channels.

By deploying Universal Consent with cross-device and cross-domain functionality spanning web and mobile, this retailer moved from disconnected consent silos to a unified infrastructure that honors customer preferences everywhere they engage with the brand.

If your organization operates across multiple digital properties and consent is managed separately in each, the compliance risk grows with every channel you add. The path forward is architecture that treats consent as a cross-platform concern from the start. If this sounds familiar, our team is ready to help.