# Do Not Allow Entry without Lot Number
**YouTube:** [How to Restrict Saving Purchase Orders Without a Lot Number?](https://youtu.be/GIULXGjfjZk)
## How to Restrict Saving Purchase Orders Without a Lot Number?
This tutorial explains how to restrict saving a **Purchase Order without a Lot Number** in Logic ERP. This feature ensures that every item entry includes a lot number, helping maintain accurate inventory tracking and batch control.
***
### **Objective of This Feature**
* Enforce **Lot Number entry** in Purchase Orders
* Improve batch-wise inventory tracking
* Prevent incomplete transactions
* Ensure data accuracy and compliance
***
#### **Access to Purchase Order Configuration**
* Go to **Purchase Order Module**
* Open **Configuration Window**
* Navigate to **Other Settings**
* Locate and enable the option labeled as:
> **“Do Not Allow Entry without Lot Number”**
* Click **OK** to apply changes.
**Functionality**
* System will not allow saving a Purchase Order without entering a Lot Number
***
### **Create Purchase Order (Without Lot Number)**
* Start a **New Purchase Order Entry**
* Enter **Supplier Name**
* Go to **Item Details Section**
* Do **not** define Lot Number
* Try to proceed/save
**System Behavior**
* System **restricts the action**
* Displays error message:
* *“Please enter the lot number”*
***
### **Create Purchase Order (With Lot Number)**
**Correct Action**
* Define the **Lot Number** for the item
**Result**
* Purchase Order is successfully saved
***
### **Key Benefits**
* Ensures proper batch tracking
* Prevents incomplete data entry
* Improves inventory accuracy
* Enhances compliance and traceability
***
### **Best Practice Tips**
* Always define lot numbers during item entry
* Use standardized lot naming conventions
* Train users on importance of batch tracking
***
### **Final Outcome**
* Purchase Orders cannot be saved without Lot Number
* Accurate batch-wise inventory management
* Reduced errors in stock tracking
* Improved operational efficiency
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