P45 redaction is the removal of personal identifiers from the leaver statement an employer issues under the Income Tax (PAYE) Regs 2003 (RTI). The form records a leaver's pay and tax to date for HMRC. anonym.plus marks the worker, NI number, and amounts on your device, so the totals stay clear while the named person is shielded.
When this applies
A P45 pairs pay-to-date with a name and a National Insurance number. You strip those identifiers before the file is shared with a payroll supplier or auditor.
How anonym.plus handles it
- Open the statement in anonym.plus on your device.
- Local OCR reads a scanned pay record.
- The tool flags the worker, NI number, and contact lines.
- Apply Mask to keep only the final NI digits.
- Keep the pay-and-tax totals the form reports.
- Save the clean copy locally.
What you need to provide
- The P45 (PDF, DOCX, or scan).
- The Mask operator for the NI number, Replace for names.
- Optional allow-list for the employer PAYE reference.
PII entity types detected
| Category | anonym.plus entity type | Example |
|---|---|---|
| Identifiers | UK_NINO | QQ 12 34 56 C → QQ •• •• 56 C |
| Names | PERSON | Owen Parry → [WORKER] |
| Financial | MONEY | pay to date £5,240 → [AMOUNT] |
| Identifiers | NATIONAL_ID | PAYE ref 123/AB456 → [PAYE] |
| Dates | DATE_TIME | leaving 15/06 → [DATE] |
| Location | LOCATION | home address → [ADDRESS] |
Compliance achieved
- Trims identifiers on the leaver statement under the Income Tax (PAYE) Regs 2003 (RTI).
- Masks the NI number to the final digits in one pass.
- Offline work keeps payroll numbers off any server.
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Limitations & cautions
A spaced NI number on a faint scan can confuse OCR, so verify image pages. The tool masks what it detects. A unique pay figure can still hint at one person, so review amounts before sharing.
Frequently asked questions
How much of the NI number may stay?
Common practice keeps the final characters. anonym.plus uses the Mask operator to hide the rest in one pass.
Will the pay-and-tax totals survive?
Yes. Allow-list the total fields the Income Tax (PAYE) Regs 2003 report so they stay while identifiers go.
Can it read a scanned pay record?
Yes. Local OCR reads the image first, then masks the values. Verify faint scans.