EU GMP Chapter 4 (EudraLex Volume 4, "Documentation") is the reference that defines how a pharmaceutical site must create, control, complete and retain its documentation. It is one of the most frequently cited chapters in inspection findings, because every GMP activity ends up, sooner or later, in a document: if the record does not hold up, neither does the evidence of the activity. This guide organises good documentation practices around the structure of Chapter 4: what the current text requires, which documents must exist, how records are completed and corrected, how long they must be retained, and what is changing with the 2025 draft revision.
What EU GMP Chapter 4 currently requires
The current version of Chapter 4 dates from January 2011 and has been in operation since 30 June 2011. Its opening principle is clear: good documentation is an essential part of the pharmaceutical quality system and is key to operating in compliance with GMP requirements. The chapter explicitly allows any form of media — paper, electronic or photographic — provided the documentation system is fit for purpose and the accuracy, integrity, availability and legibility of documents are guaranteed throughout the retention period.
Two primary objectives run through the whole chapter: defining, in a controlled way, the specifications and instructions the site works with, and ensuring that records provide reliable evidence of what was actually done. From this follows the most useful operational distinction in the text: instructions on one side, records and reports on the other.
Instructions and records: the required document types
Chapter 4 lists the document categories a site must keep under control:
- Site Master File: the description of the site's GMP activities.
- Instructions: specifications for materials and products; manufacturing formulae; processing, packaging and testing instructions; procedures (SOPs); protocols; technical agreements.
- Records and reports: batch processing and packaging records, analytical records, certificates of analysis, validation reports, training and environmental monitoring records.
The separation is not academic. An approved master batch record is an instruction: it is managed through versions, approvals and controlled distribution. A completed batch record is GMP evidence: it is managed through review, retention and retrievability. Confusing the two — for example, using uncontrolled local copies of a form as the official record — is among the most frequent documentation findings in inspections.
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Entries and corrections: good documentation practices
The operational core of Chapter 4 is its rules on entries. Records must be clear, legible and indelible, and must be made at the time each action is taken, so that all significant activities remain traceable. Documents must be approved, signed and dated by authorised persons; instructions must be written in an imperative, clear and unambiguous style; and a system must prevent the inadvertent use of superseded documents.
For corrections there is a single rule: a correction does not rewrite history. Any alteration to a record must be signed and dated, must leave the original information legible and, where appropriate, must state the reason. On paper this means a single line through the error — never correction fluid, erasure or overwriting. In electronic systems the equivalent is an attributable change process that preserves the previous value and makes it reviewable through the audit trail: behaviour to be verified during validation, not assumed.
In hybrid systems — a paper batch record supported by electronic equipment data, or an electronic workflow with scanned attachments — the site must define which record is official for each activity, how related documents are linked, and how the complete evidence set for a batch is retrieved. True copies (scans, accurate reproductions) are permitted, provided it can be demonstrated that the copy is accurate, complete and legible.
Document retention: the minimum periods
Chapter 4 sets precise minimum retention requirements, which the documentation system must guarantee together with prompt availability of records:
| Type of documentation | Minimum retention requirement |
|---|---|
| Batch documentation (authorised medicinal product) | At least 1 year after expiry of the batch, or at least 5 years after certification by the Qualified Person, whichever is longer |
| Batch documentation (investigational medicinal product, IMP) | At least 5 years after the completion or formal discontinuation of the last clinical trial in which the batch was used |
| Critical supporting documentation (e.g. validation data) | Retained for as long as the activity it supports remains valid, in line with applicable requirements |
Retention is not just archiving: the retention model must guarantee retrievability, long-term legibility, access control and the ability to link every record back to the relevant batch, product and document version — including after a system migration.
The 2025 draft revision: what is changing
On 7 July 2025 the European Commission opened the public consultation on the revision of Chapter 4, together with the revision of Annex 11 (computerised systems) and the new Annex 22 on artificial intelligence; the consultation closed on 7 October 2025. The draft of the new Chapter 4 integrates data governance principles into the documentation framework: management of data and metadata across their whole lifecycle, audit trails and ownership responsibilities, formal recognition of hybrid systems to be controlled under validated procedures, and explicit anchoring to ALCOA++ principles and the Pharmaceutical Quality System.
One caution: this is consultation material, not the applicable guideline. Until the final text is officially published, the binding reference remains the 2011 Chapter 4. The most pragmatic way to prepare is to close today the gaps the draft makes explicit — data governance, control of hybrid systems, retention of electronic records with metadata and audit trail — because these are already established inspection expectations.
GuideGxP recommendation
Chapter 4 is passed with three concrete moves. First: map the site's document inventory, separating instructions from records, and verify that every form in use is issued in a controlled version. Second: train operators on contemporaneous entries and compliant corrections using real scenarios, not slides of rules. Third: periodically test the retrieval of a batch's complete evidence package — paper, electronic and hybrid — within timescales compatible with an inspection.
To build document governance, audit trail review and data integrity controls that hold up in audits, our operational guide "Data Integrity in GMP" includes 223 hands-on pages and a ready-to-use toolkit for QA, QC and system owners.
