> For the complete documentation index, see [llms.txt](https://kb.logicerp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.logicerp.com/logic-erp-learning-hub-tutorials-and-best-practices/user-access/logic-global-admin/sale/sale-settings-2/do-not-allow-modification-of-printed-bills.md).

# Do Not Allow Modification of Printed Bills

**YouTube:** [How to Restrict the Modification of Printed Sale Bills ?](https://www.youtube.com/watch?v=bJN6mh0SKjM\&list=PLTq0qszGb3BNf2HwB0l2NVoufF-mB23ch\&index=14)

## How to Restrict the Modification of Printed Sale Bills?

In this tutorial, we will guide you on how to enable an important setting that restricts users from modifying bills once they have been printed. This ensures the authenticity and accuracy of finalized transactions.

### Steps to Enable Restriction on Modifying Printed Bills:

* **Access Logic Admin:** Navigate to the **Logic Folder** and run **Logic Admin**.
* **Open Global Settings:** Within Logic Admin, open the **Global Settings** section.
* Navigate to **"Sales Settings 2"**.
* Locate the option labeled **"Do Not Allow Modification of Printed Bills."**

<figure><img src="/files/QzruhDNAVZKEDU8v2sZX" alt=""><figcaption><p>We will keep this feature enabled to observe its impact during the billing process.</p></figcaption></figure>

* Tick this option to enable it.
* **Save and Restart:**
  * Save and restart the software for the changes to take effect.

### Verifying the Restriction:

* **Attempt to Modify a Sale Bill:**&#x20;
  * Try to modify the details of an already printed sale bill.
  * Upon attempting to save the modified bill, the software will display an **error message**:

    > "Bill has been printed. Modification is not allowed."

<figure><img src="/files/hMnTV43RhGpCa2dv51CT" alt=""><figcaption><p>As you can see in the picture, the software has displayed a prompt.</p></figcaption></figure>

### **Benefits of Restricting Modification of Printed Bills:**

* **Ensures Data Accuracy:** Prevents changes to finalized bills, maintaining accurate records.
* **Prevents Fraud:** Blocks unauthorized edits after printing.
* **Simplifies Audits:** Supports easier and compliant financial audits.
* **Builds Customer Trust:** Assures customers of bill authenticity.
* **Reduces Errors:** Eliminates accidental modifications.
* **Promotes Accountability:** Encourages careful billing practices.


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