---
title: "Tamper Detection & Notifications"
space: "Frappe Sign Documentation"
url: "https://eben.isambane.co.za/frappe-sign-docs/tamper-detection-notifications"
updated: "2026-08-06"
---


# Tamper Detection & Notifications

## Tamper detection

With **Enable Tamper Detection** on in Settings, Frappe Sign can check whether a stored file still matches the hash it recorded when the file was generated - covering the Source PDF, Signed PDF, Audit Certificate, and Final Verification PDF, on both **Frappe Sign Request** and **Frappe Sign Certificate** records.

Tamper status is one of:

```text
Not Checked
Passed
Failed
```

A status change is recorded as an activity comment. If a check flips to **Failed**, the creator of the affected signing request gets an email notification - this is the one thing in Frappe Sign that proactively alerts a human, rather than waiting to be asked.

### Manual checks

Both Frappe Sign Request and Frappe Sign Certificate have a **Verify Tamper Status** action - it ignores submitted/locked state and updates tamper status on demand, useful for spot-checking a specific document right now rather than waiting for the schedule.

### Scheduled checks

If you want this running automatically, wire up the scheduler in `hooks.py`:

```python
scheduler_events = {
    "daily": [
        "frappe_sign.utils.notifications.send_daily_signing_reminders",
        "frappe_sign.utils.tamper.run_scheduled_tamper_checks",
    ],
}
```

## Notifications

- **Completion notifications** - sent to the creator and signers once a request completes. If a final verification package exists it's attached; otherwise the signed PDF and audit certificate are sent separately.
- **Reminder notifications** - a daily reminder can go out to whichever signers are *currently* eligible to sign (respecting **Default Reminder Days** in Settings) - for sequential signing, that means only the current order/cohort, never someone who hasn't been unlocked yet.

This is the last page of the walkthrough - back to **Overview & Legal Notice** for the full picture, or jump straight back into your own Frappe Sign Settings to start configuring for real.