diff --git a/Nuvolar.Module/BusinessObjects/Business/BusinessTransactions/Invoice/InvoiceCreditNote/InvoiceCreditNoteHeader.vb b/Nuvolar.Module/BusinessObjects/Business/BusinessTransactions/Invoice/InvoiceCreditNote/InvoiceCreditNoteHeader.vb
index 049bd7f..9ea8864 100644
--- a/Nuvolar.Module/BusinessObjects/Business/BusinessTransactions/Invoice/InvoiceCreditNote/InvoiceCreditNoteHeader.vb
+++ b/Nuvolar.Module/BusinessObjects/Business/BusinessTransactions/Invoice/InvoiceCreditNote/InvoiceCreditNoteHeader.vb
@@ -86,6 +86,7 @@ Public Class InvoiceCreditNoteHeader
             SetPropertyValue("StorageMoveType", _StorageMoveType, value)
         End Set
     End Property
+    <RuleRequiredField("InvoiceCreditNoteHeader - DateExecution", DefaultContexts.Save)>
     Property DateExecution As Date
         Get
             Return _DateExecution
@@ -119,6 +120,8 @@ Public Class InvoiceCreditNoteHeader
             SetPropertyValue("PaymentOption", _PaymentOption, value)
         End Set
     End Property
+
+    <RuleRequiredField("InvoiceCreditNoteHeader - DatePayment", DefaultContexts.Save)>
     Property DatePayment As Date
         Get
             Return _DatePayment