diff --git a/smash/web/forms.py b/smash/web/forms.py
index c4fe054025fc6a62e56b823cc3ca41b192ead232..45b73ef30491cd3cff6e4b51bbfa55c7830e9a3b 100644
--- a/smash/web/forms.py
+++ b/smash/web/forms.py
@@ -94,13 +94,6 @@ class SubjectEditForm(ModelForm):
         if was_resigned:
             self.fields['resigned'].disabled = True
 
-    def clean_screening_number(self):
-        instance = getattr(self, 'instance', None)
-        if instance and instance.id:
-            return instance.screening_number
-        else:
-            return self.cleaned_data['screening_number']
-
     def clean(self):
         validate_subject_nd_number(self)
 
diff --git a/smash/web/templates/subjects/edit.html b/smash/web/templates/subjects/edit.html
index 1da6a65b6b820ba44e690e9e720cdb19274d71f5..0c8b2f5705b0de274e1cb6149ea7e249e3537b9b 100644
--- a/smash/web/templates/subjects/edit.html
+++ b/smash/web/templates/subjects/edit.html
@@ -51,9 +51,7 @@
                                 </div>
 
                                 {% if field.errors %}
-                                    <span class="help-block">
-              {{ field.errors }}
-            </span>
+                                    <span class="help-block"> {{ field.errors }} </span>
                                 {% endif %}
                             </div>
                         {% endfor %}
@@ -74,7 +72,7 @@
             </form>
         </div>
 
-        <div class="modal modal-danger fade" tabindex="-1" role="dialog">
+        <div class="modal modal-danger fade" id="confirm-dead-resigned-mark-dialog" tabindex="-1" role="dialog">
             <div class="modal-dialog" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
@@ -93,6 +91,25 @@
             </div><!-- /.modal-dialog -->
         </div><!-- /.modal -->
 
+        <div class="modal modal-danger fade" id="enable-screening-number-dialog" tabindex="-1" role="dialog">
+            <div class="modal-dialog" role="document">
+                <div class="modal-content">
+                    <div class="modal-header">
+                        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span
+                                aria-hidden="true">&times;</span></button>
+                        <h4 class="modal-title">Are you sure that you want to perfom this operation?</h4>
+                    </div>
+                    <div class="modal-body">
+                        <p>Screening number shouldn't change.</p>
+                    </div>
+                    <div class="modal-footer">
+                        <button type="button" class="btn btn-outline pull-left" data-dismiss="modal">Cancel</button>
+                        <button type="button" id="confirm-screening-change" class="btn btn-outline">Yes</button>
+                    </div>
+                </div><!-- /.modal-content -->
+            </div><!-- /.modal-dialog -->
+        </div><!-- /.modal -->
+
     {% endblock %}
 
 
@@ -122,7 +139,7 @@
                 }
                 if ((!dead_was_checked && $("#id_dead").is(":checked")) || (!resigned_was_checked && $("#id_resigned").is(":checked"))) {
                     confirmed = false;
-                    $(".modal").modal("show");
+                    $("#confirm-dead-resigned-mark-dialog").modal("show");
                     return false;
                 }
             });
@@ -130,7 +147,24 @@
                 confirmed = true;
                 $("form").submit();
             });
+
+            $("#confirm-screening-change").click(function () {
+                $('#enable-screening-number-dialog').modal('hide');
+
+                $("input[name='screening_number']").attr("readonly", false);
+                $("input[name='screening_number']")[0].focus();
+            });
+
+            $("input[name='screening_number']").attr("readonly", true);
+            $("input[name='screening_number']").after("<div><a class='btn btn-block btn-danger' onclick='show_screening_number_enable_dialog()'>modify<a/></div>");
+
+
         });
+        function show_screening_number_enable_dialog() {
+            $('#enable-screening-number-dialog').modal('show');
+        }
+
+
     </script>
 
     {% include "includes/datepicker.js.html" %}