24.1 Essential Records and Site/Sponsor Reconciliation
Key Takeaways
E6(R3) Appendix C supports evaluation of conduct, compliance and reliable results.
Original records generally remain with the responsible generating party.
TMF and ISF need appropriate relevant records rather than identical copies of everything.
Essential Records and Site/Sponsor Reconciliation
E6(R3) Appendix C treats essential records as evidence supporting evaluation of trial conduct, GCP compliance and result reliability. Some generally precede trial start; others arise during conduct or closure. The record's nature and relevance determine essentiality, not its presence in a universal folder checklist.
| Stage | Examples | What the record demonstrates |
|---|---|---|
| Before affected activities | Approved protocol/consent, authorisations, agreements, qualifications and suitable systems | The study was ready and permitted to proceed |
| During conduct | Consent, safety reports, source records, monitoring, changes and product accountability | What actually happened and how important issues were managed |
| At completion/termination | Final reports, product disposition, dataset finalisation and archive arrangements | Responsible closure and continuing availability of evidence |
Original records generally remain with the responsible party that generated them. Some records are sponsor-only, some site-only, and some are relevant to both. A sponsor monitoring report and a site follow-up communication are different records; the sponsor report is not automatically required in the ISF. The site should receive the information it needs to address findings and retain its own relevant records.
The records can be held in different repositories if their locations and access are clear. A protocol-independent validation record or institutional procedure need not be duplicated into every trial folder when it is appropriately referenced and retained. The aim is reconstruction and accountability rather than the largest possible binder.
Trial Master File (TMF) vs. Investigator Site File (ISF)
A critical distinction in clinical research management is the relationship between the sponsor's master repository and the site's local repository:
The Trial Master File (TMF)
The Trial Master File is the sponsor's comprehensive, overarching collection of essential documents for an entire clinical trial. Maintained either directly by the sponsor or delegated to a Contract Research Organization (CRO), the TMF houses trial-level governance documents, health authority submissions, central laboratory records, safety oversight committee minutes, data management specifications, and site-level records across all participating global trial centers. Under modern GCP, the TMF must be maintained in a continuous state of inspection readiness.
The Investigator Site File (ISF)
The Investigator Site File—frequently referred to in the United States as the Regulatory Binder—is maintained directly by the Principal Investigator and site study team at the clinical trial site. The ISF contains all essential documents specific to that particular investigative site's authorization, staffing, patient cohort, and operational execution.
The Confidentiality Boundary & Repository Segregation
The sponsor and investigator retain relevant records for their respective responsibilities, sharing appropriate evidence such as approvals and follow-up communication. They do not need identical repositories. Participant-identifying records need appropriate confidentiality controls and generally remain with the investigator/institution.
Reconciling site and sponsor records
A useful reconciliation compares what should exist, where it belongs, its version/status and whether the responsible party can retrieve it. Sample an approval chain: amendment text, submission, decision, implementation date, staff information/training and affected consent materials. A present approval letter alone does not establish that the authorised version reached practice.
| Check | Example question | Appropriate follow-up |
|---|---|---|
| Identity | Does the document belong to this trial and site? | Correct misfiling through a traceable process |
| Version | Does the decision cover the document used? | Reconstruct the approval/implementation sequence |
| Completeness | Are attachments, signatures and relevant metadata present? | Retrieve missing evidence; do not backdate |
| Ownership | Should the record be held by sponsor, investigator or both? | Preserve the responsible party's record and access |
| Accessibility | Can the retained record be read and retrieved? | Resolve permissions, indexing or format risks |
| Confidentiality/blinding | Is the recipient authorised to see its content? | Restrict access and invoke incident procedures if needed |
If identifiable participant information was uploaded incorrectly, promptly restrict inappropriate access and notify the designated privacy/security and quality functions. Preserve evidence and follow a controlled correction/removal process, including any required audit record. Do not independently purge the file or audit trail. E6(R3) allows rare justified audit-trail corrections, for example accidental personal information, only with a log of the action and justification.
Filing systems and reference models can be useful, but a commercial model's zone numbers are not ICH requirements or CCRA references. Apply the actual sponsor index while understanding the function and confidentiality of each record. Do not place unblinded material in a broadly accessible folder merely because its file label appears to fit.
Record identity and record status
A file can have the right title but the wrong status. An unsigned draft agreement, a submitted consent revision and an approved final version may all share a trial number while proving different things. Review version, approval state, relevant dates and scope together. A duplicate uploaded under a new filename does not create a new decision. Preserve the authoritative record and traceable changes while correcting indexing or filing errors through the controlled process. Reconciliation should establish what evidence supports the activity at the time, rather than merely counting documents with familiar names.
Official sources
Checked October 18, 2026: ICH E6(R3), Principles and Annex 1.
A sponsor asks a site to hold every internal sponsor monitoring report. What is the correct general principle?
Every sponsor and site repository must be identical.
The site should hold no monitoring communication.
All participant identity linkage should be routinely copied to the sponsor.
Record ownership and relevance determine retention; the site needs appropriate findings communication and its own relevant records.
Sections you finish are checked off in the contents.