# Default GRN Pre-Fix

YouTube: [How to set Default GRN Prefixes in Purchase?](https://www.youtube.com/watch?v=yx8fgyDm0KQ)

## How to set Default GRN Prefixes in Purchase?

In this tutorial, we will guide you through the process of defining a **default GRN prefix** in Logic ERP to automate GRN number generation.

### **Steps to Enable Default GRN Prefix:**

* Open **Purchase Voucher Configuration**.
* Navigate to **Other Settings 1**, then click on **Other Settings** again.
* Go to the **Defaults 2** tab and Locate the **Default GRN Prefix** field and enter the desired prefix (e.g., **GRN**).

<figure><img src="/files/MfSlwOzeADzlg4G6mBEr" alt=""><figcaption><p>"This picture illustrates how you can define the Default GRN Prefix."</p></figcaption></figure>

### &#x20;**Unlock GRN Number Field:**

* Click on **Column Locks**.
* Uncheck the **GRN number field** to allow automatic number generation.
* Save the settings.

<figure><img src="/files/6Pn90W3x6I6yAflEfR76" alt=""><figcaption><p>"As shown, you need to unlock the GRN column in the same way."</p></figcaption></figure>

### Effect of This Setting:

* Create a new purchase voucher.
* The system will now generate GRN numbers automatically (e.g., **GRN1, GRN2, GRN3**).

<figure><img src="/files/5yFRAHcj20W9NNcbaEKE" alt=""><figcaption><p>"Here, you can see that the GRN number has been generated automatically."</p></figcaption></figure>

### **Define Multiple GRN Prefixes (Optional):**

* To set multiple prefixes, enter them separated by a comma (e.g., **GRN, INV**).
* This allows different prefixes to be used within the same configuration.

By following these steps, you can ensure an **automated and structured** GRN numbering system, improving efficiency in purchase management.


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