You may want to look up an order by the customer's PO number.

This is useful if you have a customer's PO number, but very little other information.

Also if you need to check whether a customer's PO has already been entered and processed in SAP before manually processing it yourself to avoid duplicating it.

1. Sign in to SAP.
    
2.  Use transaction code VA03 - Sales Order Display by typing it into the trasaction bar or selecting from your saved transaction codes.
   
   
    
3.  Enter the PO number into the purchase order field and click "search."
   
   
   
   4. A list will be returned of all purchase order numbers that match your entry.
   
   If no results are returned, you can assume the PO has not been entered under that number. Make sure you match the PO number format exactly! This includes letters, dashes, or zeros at the beginning of the PO number.
   
   
   When a result is returned, you will know this PO number has been processed and you can find useful information about it here.
   
   Sold-To Party: indicates the customer account ID.
   DV: the division code can tell you what kind of products the order is for.
   Created By: The user who entered the PO into CRM or SAP.
   Document: This is referred to as the sales order number and the order confirmation number. It is useful for Customer Care and Billing teams when invoicing.
   
   5. Double click the purchase order number to fully display it.
   
   
   
   Here you can check line items, prices, dates and status of the order!