diff --git a/Interfaces/ZUGFeRDInterface/PropertyValues.vb b/Interfaces/ZUGFeRDInterface/PropertyValues.vb
index dd2013c6..c0cf30f5 100644
--- a/Interfaces/ZUGFeRDInterface/PropertyValues.vb
+++ b/Interfaces/ZUGFeRDInterface/PropertyValues.vb
@@ -104,7 +104,9 @@ Public Class PropertyValues
                     Dim oPropertyValue = oColumn.Value.ElementAtOrDefault(oRowIndex)
 
                     _logger.Debug("Processing itemSpecification *TableColumn* [{0}].", oTableColumn)
-
+                    If oTableColumn = "INVOICE_SELLER_EMAIL" Then
+                        Console.WriteLine("INVOICE_SELLER_EMAIL")
+                    End If
                     If IsNothing(oPropertyValue) OrElse String.IsNullOrEmpty(oPropertyValue) Then
                         If oColumn.Key.IsRequired Then
                             _logger.Warn($"{MessageId} # oPropertyValue for specification [{oTableColumn}] is empty or not found but is required. Continuing with Empty String.")