Archiving Chain of Custody Records in Clinical Trials: Regulatory Strategies and Best Practices

Introduction: Why Archiving CoC Records Matters

Chain of Custody (CoC) records ensure accountability in the handling, transfer, and receipt of clinical samples throughout the trial lifecycle. These records serve as crucial evidence of sample integrity and regulatory compliance. Improper or incomplete archiving of these documents can jeopardize trial outcomes, lead to inspection findings, or even data rejection.

With FDA, EMA, and ICH-GCP increasingly focused on data integrity and traceability, the need for robust CoC record archiving systems has never been greater. This article provides a comprehensive guide on archiving CoC documentation — from regulatory expectations and retention timelines to real-world examples, digitization strategies, and CAPA considerations.

Regulatory Expectations for Chain of Custody Document Archiving

CoC logs, whether in paper or electronic format, must be archived in compliance with the following regulatory standards:

• FDA 21 CFR 312.57(c): Sponsors must retain records, including custody logs, for at least 2 years after the last approval or discontinuation.
• EMA GCP Directive 2005/28/EC: Requires retention of essential trial documents (including sample transfer logs) for at least 5 years post-trial or longer depending on national law.
• ICH GCP E6(R2): Emphasizes that documentation must be stored in a manner that ensures accessibility, legibility, and audit-readiness.

CoC records are part of the essential documents listed in ICH GCP and must be included in the Trial Master File (TMF) or equivalent systems. Their preservation is central to demonstrating compliance during audits and inspections.

Types of Chain of Custody Records That Require Archiving

• Site-generated custody logs (paper or electronic)
• Courier handover documentation
• Lab intake records (e-signature or stamped)
• Temperature tracking during shipment
• Deviation or discrepancy reports related to sample transfer
• Corrective and Preventive Action (CAPA) records associated with custody issues
• Training records for CoC SOPs

Paper vs. Electronic: Choosing the Right Archiving Format

The choice between paper and electronic storage depends on the sponsor’s archiving infrastructure, system validation, and regulatory acceptance in operational regions. Here’s a comparison:

Case Study: CAPA Triggered by Inaccessible Archived CoC Logs

During a sponsor inspection in Germany, EMA inspectors requested access to archived custody records for a study completed 6 years earlier. The CRO responsible for archiving had moved the boxes offsite and mislabeled the storage location. It took over 3 weeks to retrieve the records.

Findings: Lack of inventory tracking system and archiving SOP deficiencies.

CAPA Measures:

• Established a centralized document inventory system with barcode tracking
• Updated archiving SOP to include detailed indexing and access protocol
• Trained CRO staff on archiving procedures and sponsor access requirements

Best Practices for CoC Archiving

• Create an SOP for archiving chain of custody records specific to GCP requirements
• Maintain an up-to-date archive inventory log including box number, content, and retrieval pathway
• Ensure backup of electronic custody logs in multiple data centers (if cloud-based)
• Include CoC records in TMF/eTMF system with clear labeling
• Audit archive vendors annually and document qualification/agreements
• Ensure that scanned copies of paper custody logs are certified as true copies
• Track chain of custody record lifecycle from creation to destruction/retirement

Retention Timelines by Region

External Reference for Archiving Guidance

For broader expectations on retention and digital preservation of clinical records, refer to Japan’s RCT Portal which includes PMDA-linked documentation requirements.

Conclusion

Archiving chain of custody records is not just a storage task—it is a regulatory obligation. Whether through eTMF systems, physical archives, or hybrid models, clinical teams must implement traceable, audit-ready, and SOP-driven practices. By aligning with global retention timelines and inspection readiness strategies, sponsors can ensure the long-term integrity and usability of their sample custody records, even years after trial closure.