# Do not allow Discount Coupons in case of discounted bill
**YouTube:** [How to Prevent Use of Discount Coupons on Discounted Bills?](https://www.youtube.com/watch?v=JCPbcSsJ4B8)
## How to Prevent Use of Discount Coupons on Discounted Bills?
In this tutorial, we will explore a **Logic ERP feature** that prevents the use of **discount coupons** if any other **discounts or schemes** have already been applied to a bill.
***
### Access Global Settings in Logic Admin
* Open **Logic Admin**.
* Navigate to **Global Settings**.
* Under **POS Options**, go to the **POS Options 1** section.
* Locate and enable the option labeled as:
> **"Do not allow Discount Coupons in case of discounted bill"**
* Click **Save and** **restart the software** to apply the changes.
***
### Implement **the Functionality**
* Open the **Sale Bill – Touch Screen** window.
* Add an item to the bill.
* Apply a **Trade Discount** (e.g., 5%) while entering item details.
* Now try to **apply a discount coupon** to the same bill.
***
### **System Response**
When you attempt to save the voucher:
* The system will **restrict the entry**.
* An **error message** will appear stating:
> “Discount coupons are not allowed in case of other discounts or schemes.”
***
### **Use Case & Benefit**
This setting helps:
* Maintain **billing discipline** by avoiding overlapping discounts.
* Ensure that **discount rules** are enforced consistently.
* Prevent revenue loss from **stacked discount misuse**.
