Acting early and clearly increases your chances of keeping your case on track.

Types of mistakes you might make
Mistakes generally fall into two groups:

Minor errors: typos, incorrect dates, wrong job titles

Material errors: missing key facts, mislabelling a legal claim, or omitting incidents central to your claim

Knowing the type of mistake helps you decide how to fix it.

Correcting minor errors
Rectifying obvious errors
minor formal errorscan be corrected—like a wrong date or typographical slip—without much difficulty. But you must fix them promptly once noticed.

How to apply
Submit a short application (ideally in writing), attach your corrected document, and briefly explain you’re fixing a simple mistake. This shows good faith and respect for tribunal rules.

Correcting material errors
For more significant mistakes, like missing incidents or incorrect legal labels, you need formal permission under Rule 29. The tribunal will then decide if your change is fair and timely.

Show you acted responsibly
When applying:
1. Include your original document with tracked changes
2. Write clearly why you're making the change
3. Explain why the addition ties back to your existing facts—tribunals are more forgiving when relabelling rather than introducing new issues.