diff --git a/Examples/ShowDocumentChanges.php b/Examples/ShowDocumentChanges.php
new file mode 100644
index 00000000..6babbba7
--- /dev/null
+++ b/Examples/ShowDocumentChanges.php
@@ -0,0 +1,32 @@
+#!/usr/bin/php -f
+<?php
+/**
+ * AbraFlexi - Example how to copy Invoice
+ *
+ * @author     Vítězslav Dvořák <info@vitexsofware.cz>
+ * @copyright  (G) 2017 Vitex Software
+ */
+
+namespace Example\AbraFlexi;
+
+include_once './config.php';
+include_once '../vendor/autoload.php';
+
+include_once './common.php';
+
+$invoiceID = askForFlexiBeeID();
+
+/*
+ * AbraFlexi Classes accept this form of initial identifier:
+ *
+ * (int) 2588
+ * (string) ext:ESHOP:oi1978
+ * (array) ['varSym'=>'20080015']
+ */
+
+$invoice = new \AbraFlexi\FakturaVydana($invoiceID);
+if ($invoice->getMyKey()) {
+    print_r($invoice->getChanges());
+} else {
+    $originalInvoice->addStatusMessage('Source Invoice does not exists');
+}
diff --git a/src/AbraFlexi/Adresar.php b/src/AbraFlexi/Adresar.php
index 6ef62709..24b0d9d0 100644
--- a/src/AbraFlexi/Adresar.php
+++ b/src/AbraFlexi/Adresar.php
@@ -21,6 +21,7 @@ class Adresar extends RW {
     use Stitky;
     use SubItems;
     use Firma;
+    use GetChanges;
 
     /**
      * Evidence užitá objektem.
diff --git a/src/AbraFlexi/Banka.php b/src/AbraFlexi/Banka.php
index 2c45bb11..db5494b3 100644
--- a/src/AbraFlexi/Banka.php
+++ b/src/AbraFlexi/Banka.php
@@ -28,6 +28,7 @@ class Banka extends RW {
     use Firma;
     use Email;
     use SubItems;
+    use GetChanges;
 
     /**
      * Evidence užitá objektem.
diff --git a/src/AbraFlexi/Cenik.php b/src/AbraFlexi/Cenik.php
index b2b58b49..5dd7d8eb 100644
--- a/src/AbraFlexi/Cenik.php
+++ b/src/AbraFlexi/Cenik.php
@@ -25,6 +25,7 @@ class Cenik extends RW {
 
     use Stitky;
     use SubItems;
+    use GetChanges;
 
     /**
      * Evidence užitá objektem.
diff --git a/src/AbraFlexi/Exception.php b/src/AbraFlexi/Exception.php
index 28f51358..1035e183 100644
--- a/src/AbraFlexi/Exception.php
+++ b/src/AbraFlexi/Exception.php
@@ -7,7 +7,7 @@
  * From:      https://vitexsoftware.abraflexi.eu:5434
  *    
  * @author     Vítězslav Dvořák <vitex@arachne.cz>
- * @copyright  (C) 2021 Spoje.Net
+ * @copyright  (C) 2021-2022 Spoje.Net
  */
 
 namespace AbraFlexi;
diff --git a/src/AbraFlexi/FakturaPrijata.php b/src/AbraFlexi/FakturaPrijata.php
index c952d895..200b3817 100644
--- a/src/AbraFlexi/FakturaPrijata.php
+++ b/src/AbraFlexi/FakturaPrijata.php
@@ -22,6 +22,7 @@ class FakturaPrijata extends RW {
     use Firma;
     use Sum;
     use SubItems;
+    use GetChanges;
 
     /**
      * Evidence použitá třídou.
diff --git a/src/AbraFlexi/FakturaVydana.php b/src/AbraFlexi/FakturaVydana.php
index 4b75b2c4..5553c8e4 100644
--- a/src/AbraFlexi/FakturaVydana.php
+++ b/src/AbraFlexi/FakturaVydana.php
@@ -23,7 +23,8 @@ class FakturaVydana extends RW {
     use Sum;
     use SubItems;
     use Email;
-
+    use GetChanges;
+    
     /**
      * Evidence užitá objektem.
      *
diff --git a/src/AbraFlexi/InterniDoklad.php b/src/AbraFlexi/InterniDoklad.php
index 73754ab6..5f084ddf 100644
--- a/src/AbraFlexi/InterniDoklad.php
+++ b/src/AbraFlexi/InterniDoklad.php
@@ -22,6 +22,7 @@ class InterniDoklad extends RW {
     use Firma;
     use Sum;
     use Email;
+    use GetChanges;
 
     /**
      * Evidence použitá třídou.
diff --git a/src/AbraFlexi/ObjednavkaPrijata.php b/src/AbraFlexi/ObjednavkaPrijata.php
index baa4024c..b8d1470d 100644
--- a/src/AbraFlexi/ObjednavkaPrijata.php
+++ b/src/AbraFlexi/ObjednavkaPrijata.php
@@ -15,6 +15,7 @@ class ObjednavkaPrijata extends RW {
     use Firma;
     use Sum;
     use Email;
+    use GetChanges;
 
     /**
      * Evidence použitá třídou.
diff --git a/src/AbraFlexi/Pokladna.php b/src/AbraFlexi/Pokladna.php
index 9cc82ab0..0aaad134 100644
--- a/src/AbraFlexi/Pokladna.php
+++ b/src/AbraFlexi/Pokladna.php
@@ -19,6 +19,7 @@
 class Pokladna extends RW {
 
     use Stitky;
+    use GetChanges;
 
     /**
      * Evidence užitá objektem.