diff --git a/quickbooks/objects/purchaseorder.py b/quickbooks/objects/purchaseorder.py
index <HASH>..<HASH> 100644
--- a/quickbooks/objects/purchaseorder.py
+++ b/quickbooks/objects/purchaseorder.py
@@ -50,6 +50,7 @@ class PurchaseOrder(DeleteMixin, QuickbooksManagedObject, QuickbooksTransactionE
         self.DueDate = None
         self.ExchangeRate = 1
         self.GlobalTaxCalculation = "TaxExcluded"
+        self.Memo = None
 
         self.TxnTaxDetail = None
         self.VendorAddr = None
Added memo field 

Memo field mapped to "Your message to vendor" in UI