Maternity certificate redaction is the removal of personal and health data from a MATB1. The Maternity and Parental Leave etc. Regs 1999, read with the Employment Rights Act 1996, let an employer confirm the right to time off, yet the clinical detail stays private under UK GDPR Art. 9. anonym.plus marks each item on your own device.
When this applies
A midwife's MATB1 carries the mother's name, an NHS number, and the expected week of childbirth. You trim those identifiers before the form passes to a line manager who needs only the booked dates.
How anonym.plus handles it
- Open the certificate in anonym.plus on your workstation.
- Local OCR reads a scanned, signed MATB1 page.
- The tool flags the name, NHS number, and the due date.
- Keep the qualifying-week box a manager must verify.
- Swap each item for a steady label, or black it out.
- Save the clean copy. It never leaves your machine.
What you need to provide
- The certificate (PDF, DOCX, or scan).
- An operator: Replace (swap), Redact (black out), or Mask (partial).
- Optional alias map if you must re-link the mother later.
PII entity types detected
| Category | anonym.plus entity type | Example |
|---|---|---|
| Names | PERSON | Charlotte Whitfield → [EMPLOYEE] |
| NHS Number | UK_NHS | 485 777 3456 → [NHS_NO] |
| Clinician | PERSON | Midwife S. Pratt → [CLINICIAN] |
| Dates | DATE_TIME | due 14/09/2026 → [DATE] |
| NI number | UK_NINO | QQ 12 34 56 C → [NINO] |
| Contact | PHONE_NUMBER | +44 7700 900142 → [PHONE] |
Compliance achieved
- Supports proof of entitlement under the Maternity and Parental Leave etc. Regs 1999.
- Treats the clinical detail as special category data under UK GDPR Art. 9.
- Runs fully offline, so the certificate never reaches a server.
- Working copies are guarded by AES-256-GCM; 340+ PII types across 48 languages.
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Limitations & cautions
The tool flags named items, but a due date plus a small team can still single out the mother. Review free-text notes yourself, and store the certificate apart from the general personnel file as the ICO expects for special category data.
Frequently asked questions
What may an employer keep from a MATB1?
Enough to confirm the right to statutory maternity pay and time off under the 1999 Regulations and ERA 1996. The NHS number and other clinical detail can be trimmed, and anonym.plus flags them so you decide.
Is the certificate uploaded for processing?
No. The desktop app runs on your device with no cloud step, so the special category data stays on your machine.
Will the form still read after the swap?
Yes. The Replace operator drops a steady label in place of each item, so the booked dates still make sense without naming the mother.