This is a ready-to-use work instruction for the exact, task-level steps a signer follows at the moment of signing a hybrid record, where one half of the transaction is electronic and the other is a handwritten signature on paper. It sits one level below the hybrid paper-and-electronic record control and reconciliation SOP, which governs the broader program (declaring the governing record, reconciliation, escalation, retirement). This work instruction answers a narrower question the SOP does not walk through step by step: what does the person actually do, in what order, so the wet-ink signature and the electronic record stay provably linked. Replace every <<FILL: ...>> placeholder with your own specifics. A worked filled specimen follows. Verify each cited regulation against the current source before you rely on it.
Document control header
| Field | Entry |
|---|---|
| Work instruction title | Hybrid System Signature Workflow |
| Document number | <<FILL: WI-ID, e.g. WI-QA-058>> |
| Version | <<FILL: version>> |
| Effective date | <<FILL: effective date>> |
| Parent SOP | <<FILL: SOP-ID for hybrid record control and reconciliation>> and <<FILL: SOP-ID for electronic signature management>> |
| Applies to | <<FILL: system(s) / process(es) in scope>> |
1. When to use this work instruction
Use this work instruction whenever a system produces an electronic GxP record but the signature captured at review or approval is a handwritten signature on a printed copy, or the reverse, a paper-originated activity is later summarized or approved inside an electronic system. It applies to the three common hybrid signature patterns:
- Pattern 1, electronic record, wet-ink signature. The system generates the record electronically (a chromatogram, a batch step, a result) but the reviewer or approver signs a printout because the system lacks electronic signature capability or the signature workflow has not yet been qualified.
- Pattern 2, paper activity, electronic summary or storage. The activity is performed and recorded on paper, and an electronic system later stores a scanned image, a summary, or a downstream entry derived from it.
- Pattern 3, mixed signers. Within the same record, some signers apply an electronic signature and others apply a wet-ink signature, typically during a transition period while a system’s electronic signature capability is being rolled out or qualified.
This work instruction does not cover fully electronic signature workflows (see the SOP: Electronic Signature Lifecycle Management) or the reconciliation and escalation procedure once the record exists (see the parent SOP above). It covers only the bridging steps at the point of signing.
2. Roles
| Role | Responsibility |
|---|---|
| Operator / analyst | Generates or retrieves the electronic record; prints it when a wet-ink signature is required; carries the machine-generated identifier onto the paper. |
| Reviewer / approver | Applies the wet-ink signature with the required elements; confirms the printed record matches the current electronic record version before signing. |
| System / process owner | Declares which pattern applies for a given record type and keeps the declaration current in the hybrid inventory. |
| Quality Assurance | Approves the pattern declaration; audits that the linking identifier is actually present and legible on a sample of signed records. |
3. Step-by-step procedure
Step 1: Confirm the pattern and the governing record
Before signing anything, confirm which of the three patterns in section 1 applies to this record type, per the declaration in the hybrid inventory (<<FILL: register reference>>). Do not decide this at the point of signing; it should already be documented for the record type.
Per-step acceptance: The signer can state which pattern applies and point to where it is declared, without guessing.
Step 2: Generate or retrieve the electronic record and its identifier
Generate the electronic record (or retrieve the completed one) and confirm the system has produced a machine-generated identifier, such as a result ID, sequence name, or record version number, that is not typed by a person.
Per-step acceptance: The identifier is visible on screen, and it is a system-generated value, not a free-text field a user could alter.
Step 3: Print the record for signature (Pattern 1 and mixed signers)
Print the record in the format that will carry the signature. Confirm the printout displays the machine-generated identifier, the record content, and, where the system supports it, a version or timestamp marker showing exactly which iteration of the record is being printed.
Per-step acceptance: The printout is legible, dated by the system (not handwritten), and carries the identifier in a location that will not be obscured by the signature block.
Step 4: Apply the wet-ink signature
The signer applies a handwritten signature to the printed record, writing:
- Printed name (not only an initial or an illegible signature).
- Date the signature is applied.
- The meaning of the signature (for example “Reviewed by” or “Approved by”), from a controlled list matching the meanings used in the electronic system, so the paper and electronic vocabularies do not silently diverge.
Per-step acceptance: All three elements are present and legible; the meaning used matches a defined, controlled term.
Step 5: Bind the signature to the specific record version
Write the machine-generated identifier (from Step 2) onto the signed paper if it is not already printed there, and note the record version if the system supports versioning. If the electronic record is later reprocessed or a new version is generated, the existing wet-ink signature does not carry forward to the new version; a new signature is required against the new identifier.
Per-step acceptance: A reviewer, months later, can look at the paper and the electronic record side by side and confirm, from the identifier alone, that they refer to the same specific version of the same record.
Step 6: Handle a mixed-signer record (Pattern 3)
Where some signers on the same record apply an electronic signature and others apply wet-ink, record on the paper (or in a linked comment field in the electronic system) that a parallel electronic signature exists elsewhere, and vice versa, so a reviewer assembling the full picture knows to look in both places. Do not treat a partially electronic, partially wet-ink record as complete until both halves are accounted for.
Per-step acceptance: The record cross-references both signature locations; a reviewer does not have to already know the process to find both.
Step 7: File, scan, or archive per the certified-copy process
Where the paper signature needs to be represented electronically for archival or distribution, follow the certified-copy scanning process (<<FILL: SOP-ID for certified copy generation>>) so the scanned image is verified as a true and complete reproduction, not just a convenience file.
Per-step acceptance: The scanned copy carries the certification statement, and the original paper is retained or disposed of per the records retention procedure, not discarded on assumption.
Step 8: Escalate exceptions
If the printed record does not match the current electronic record (a reprocessing occurred between printing and signing), if the identifier is missing or illegible, or if a signer cannot state the meaning of the signature they applied, stop and escalate per the parent hybrid-records SOP rather than completing the signature. Do not sign around a mismatch.
Per-step acceptance: No signed record exists where the paper and electronic identifiers disagree, or where a known mismatch was signed anyway.
4. Acceptance criteria for the completed workflow
- The pattern applied to this record type is documented and matches what actually happened.
- The wet-ink signature carries printed name, date, and a controlled meaning.
- The machine-generated identifier appears on both halves and resolves to one specific record version.
- Any mixed-signer arrangement is cross-referenced so both halves are discoverable.
- No signature was applied against a record known to be stale or mismatched.
5. References
21 CFR Part 11, sections 11.50 (signature manifestation), 11.70 (signature/record linking), 11.100 (uniqueness, identity verification). EU GMP Annex 11 (Computerised Systems), clause 14 (electronic signatures) and general principles on hybrid record control. FDA guidance, Data Integrity and Compliance With Drug CGMP, Questions and Answers (December 2018).
Confirm the current version and clause numbers of each reference before issue.
6. Revision history
| Version | Date | Author | Summary of change |
|---|---|---|---|
<<FILL: 1.0>> | <<FILL: date>> | <<FILL: author>> | Initial issue. |
7. Approvals
| Role | Name | Signature | Date |
|---|---|---|---|
| Author | <<FILL>> | ||
| Reviewer (QA) | <<FILL>> | ||
| Approver (Quality Head) | <<FILL>> |
Filled specimen
The following shows the workflow completed for an example standalone chromatography workstation that lacks electronic signature capability, so review is captured on a printed report. Details are illustrative.
| Step | What happened |
|---|---|
| 1. Pattern confirmed | Pattern 1 (electronic record, wet-ink signature), per hybrid inventory entry HYB-014 |
| 2. Record and identifier | Result set for sequence SEQ-2607-118, result IDs 4471-01 through 4471-12 |
| 3. Printed | Printout PR-4471, generated 2026-07-12 15:58, showing all twelve result IDs and the sequence name |
| 4. Wet-ink signature | ”M. Lindqvist, Reviewer, Reviewed by, 12-Jul-2026” written below the results |
| 5. Bound to version | Result IDs and sequence name from Step 2 already appear on the printout; reviewer confirmed no reprocessing occurred between printing and signing by checking the audit trail timestamp against the print timestamp |
| 6. Mixed signers | Not applicable; both reviewer and approver signed on paper for this record type |
| 7. Archival | Printout scanned per the certified-copy procedure, certification statement applied, original paper retained per the site retention schedule |
| 8. Exceptions | None; no mismatch found |
What makes this specimen defensible is Step 5: the reviewer did not simply sign the printout, they checked that the audit trail showed no activity between the print time and the signature time, which is the concrete action that prevents a signature from being applied to a record that has since moved on.
Common inspection findings this work instruction prevents
- A wet-ink signature applied to a printout with no way to tell which electronic record version it refers to.
- A record reprocessed after printing, with the old signature treated as still valid for the new result.
- A signature meaning on paper that does not match any controlled meaning used in the electronic system.
- A mixed electronic-and-paper signature record where a reviewer can only find one of the two halves.
- Certified copies created with no certification statement, so the scanned file cannot be defended as a true copy.
How to adapt this work instruction
- Set your document number and point the parent-SOP fields at your actual hybrid-records and electronic-signature SOPs.
- In Step 2, name the actual machine-generated identifier your specific system produces; this is the detail that makes Step 5 possible.
- In Step 4, list your organization’s actual controlled signature meanings so paper and electronic vocabularies match.
- If your systems are mid-transition to full electronic signature, keep Step 6 active; retire it once Pattern 3 no longer occurs.
- Confirm every regulation in section 5 against the current published version before issue.