# Validation Days
**YouTube:** [How to Configure Validation Days for Purchase Order Expiry?](https://youtu.be/ZYvzUeNLSO4)
## How to Configure Validation Days for Purchase Order Expiry?
This tutorial explains how to **define Validation Days for Purchase Orders** in Logic ERP and control their usability within a specified time period. It demonstrates how expired purchase orders are restricted during retrieval and how strict validation ensures compliance with defined timelines.
***
### **Objective of Validation Days**
* Define the **Validity Period** for Purchase Orders
* Restrict usage of **Expired Purchase Orders**
* Ensure **timely processing of transactions**
* Improve **control and compliance** in procurement
***
### **Access Configuration**
* Open **Purchase Order Configuration Window**
* Navigate to **General Options Section**
**Define Validation Days**
* Locate the field:
* **“Validation Days”**
* Enter the number of days for PO validity
* Click **Ok.**
**Meaning**
* Purchase Order will remain valid only for the defined number of days
* It can be retrieved in Purchase Voucher **within this period only**
***
### **Creating Purchase Order**
* Create a **New Purchase Order Entry**
**System Behavior**
* **Valid Days & Valid till Date** is auto-calculated
* Displayed based on configuration
* Enter item details
* Click **Save**
***
### **Enable Strict Validation in Purchase Voucher**
#### **Configuration Setup**
* Open **Purchase Voucher Configuration**
* Locate and enable the option Labeled as:
> **“Do Not Allow Entry Beyond Validity Days”**
* Click **Save**
***
### Implement **Expired Purchase Order**
#### **Scenario: Bill Date Beyond Validity**
* Open **Purchase Voucher Window**
* Select Supplier and enter bill details
* Enter a **Bill Date beyond PO validity**
* Try to retrieve Purchase Order
**Result**
* No pending Purchase Orders will be displayed
* PO is considered **expired**
***
### Implement **Valid Purchase Order**
#### **Scenario: Bill Date Within Validity**
* Enter **Bill Date within validity period**
* Retrieve Purchase Order
**Result**
* Purchase Order appears in search list
* Can be successfully selected and processed
***
### **Restriction on Saving After Expiry**
* Retrieve PO within valid period
* Change the **Bill Date beyond validity**
* Attempt to save
**System Behavior**
* System restricts saving
* Displays **error message due to validation rules**
***
### **Key Benefits**
* Ensures **timely execution of Purchase Orders**
* Prevents use of **outdated or expired orders**
* Strengthens **procurement control**
* Improves **data accuracy and compliance**
***
### **Best Practice Tips**
* Define realistic validation days based on business cycle
* Always enable strict validation for better control
* Monitor expired POs regularly
***
### **Final Outcome**
* Purchase Orders are valid only within **defined time limits**
* Expired PO's are automatically restricted
* System enforces **strict validation and discipline**
* Procurement process becomes **controlled and reliable**
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