> 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/setups/configurations/purchase-voucher-configurations/other-settings-1/do-not-allow-entry-w-o-purchase-order-challan.md).
# Do Not Allow Entry W/O Purchase Order/Challan
**YouTube Link:** [How to make Purchase entry mandatory through Order or Challan only in Logic ERP Software?](https://www.youtube.com/watch?v=zkZlL3_KAHc)
## How to make Purchase entry mandatory through Order or Challan only in Logic ERP Software?
In this tutorial, we'll explore a feature that restricts purchase entries in the ERP system without a purchase order or challan. This improves security and control over procurement processes.
### Setup-by-Step Guide
* Navigate to the "Purchase Voucher Configuration".
* Select the option "Do Not Allow Entry W/O Purchase Order/Challan".
* Tick the checkbox to activate this validation.
Let's Keep this feature enable to observe it's Impact.
### **Observe Effect on Purchase :**
* Create a "Purchase Bill".
* As soon as you enter the item and move to the next line in the grid, the software will prompt, "No Entry Allowed Without Purchase Order/Challan."
Prompt for "No Entry Allowed Without Purchase Order/Challan."
By Implementing these measures, you can effectively restrict manual purchase entries within the ERP system, thereby enhancing security and ensuring greater control over your procurement processes.
---
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