# Do not allow Modification of Bill against which Payment has been received

**YouTube:** [How to Restrict Modification of Sale Bills with Received Payments ?](https://www.youtube.com/watch?v=WkC7zWUrL2o)

## How to Restrict Modification of Sale Bills with Received Payments?

In this tutorial, we will guide you through enabling an option that prevents modifications to a bill once a payment has been received against it. This feature helps ensure the integrity of financial records and prevents accidental changes after payment.

### Steps to Enable the Restriction on Bill Modifications After Payment:

* **Open Logic Admin:**
  * Navigate to **Logic Admin**.

<figure><img src="https://4031188996-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXMVkjt8zqHBQX1c9QvFS%2Fuploads%2Fc2dknfHd6affFjSICLMj%2FAdmin%20Guide.png?alt=media&#x26;token=e3b67e4c-f57a-47c6-86c9-18fdce622569" alt=""><figcaption><p>As mentioned above, search for <strong>Logic Admin</strong> and open it.</p></figcaption></figure>

* **Access Global Settings:**
  * Within **Logic Admin**, go to **Global Settings**.
* **Locate Sales Settings:**
  * Under the **Sales Settings** -2 tab, Locate  the option labeled **"Do Not Allow Modification of Bill Against Which Payment Has Been Received."**

<figure><img src="https://4031188996-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXMVkjt8zqHBQX1c9QvFS%2Fuploads%2FAMCPo6WXrhCD5af8nmCG%2FAdmin-Setup.png?alt=media&#x26;token=d97c5e57-1883-4885-8364-8d4621190b08" alt=""><figcaption></figcaption></figure>

* Enable this option to restrict any changes to a bill once payment has been received.
* Click **Save** to apply the settings.
* **Restart the Software:**
  * Restart the software to ensure the changes take effect.

### Testing the Restriction:

* Now, proceed to record a payment entry received from a customer.
* A list of pending bills will appear.&#x20;
* Adjust the payment against the appropriate bill and save the voucher.

### Verifying the Restriction:

* Try to modify the bill after the payment has been adjusted. For example, attempt to change the rate of the bill to 1,500 rupees.
* As soon as you try to save the modified bill, the software will generate an **alert** notifying you that payment has already been received against this bill, and therefore, it cannot be modified.

<figure><img src="https://4031188996-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FXMVkjt8zqHBQX1c9QvFS%2Fuploads%2FV5IeTrBpbTVQizjRfr1Q%2FError%20Prompt.png?alt=media&#x26;token=68ca26a3-1ad6-40c4-901f-d506e1295cb7" alt=""><figcaption></figcaption></figure>

### **Benefits of Restricting Bill Modifications After Payment:**

* **Data Integrity:** Ensures accurate, final transaction records by preventing post-payment changes.
* **Fraud Prevention:** Reduces the risk of fraudulent alterations to bills.
* **Financial Transparency:** Maintains clear, traceable transaction histories for audits.
* **Accountability:** Ensures employees cannot modify finalized bills after payment.
* **Error Reduction:** Eliminates the possibility of accidental changes to completed transactions.
* **Simplified Reconciliation:** Makes matching payments to invoices easier for accounting.
* **Customer Trust:** Builds confidence by ensuring bills are final and unchangeable after payment.