diff --git a/frontend/app/scripts/controllers/case/ObservableCreationCtrl.js b/frontend/app/scripts/controllers/case/ObservableCreationCtrl.js
index 0aa20047b3..03a3548272 100644
--- a/frontend/app/scripts/controllers/case/ObservableCreationCtrl.js
+++ b/frontend/app/scripts/controllers/case/ObservableCreationCtrl.js
@@ -13,6 +13,7 @@
             $scope.params = params || {
                 ioc: false,
                 sighted: false,
+                ignoreSimilarity: false,
                 single: false,
                 isUpload: true,
                 isZip: false,
@@ -74,6 +75,7 @@
                         dataType: params.dataType,
                         ioc: params.ioc,
                         sighted: params.sighted,
+                        ignoreSimilarity: params.ignoreSimilarity,
                         tlp: params.tlp,
                         message: params.message,
                         tags: _.unique(_.pluck(params.tags, 'text'))
diff --git a/frontend/app/views/partials/observables/creation/form.html b/frontend/app/views/partials/observables/creation/form.html
index aedf952384..43de4393ac 100644
--- a/frontend/app/views/partials/observables/creation/form.html
+++ b/frontend/app/views/partials/observables/creation/form.html
@@ -112,6 +112,17 @@
     </div>
 </div>
 
+<div class="form-group">
+    <label class="col-md-3 control-label">Ignore for similarity</label>
+    <div class="col-md-9">
+        <p class="form-control-static">
+            <a href ng-click="params.ignoreSimilarity = !params.ignoreSimilarity">
+                <i class="text-primary fa" ng-class="{ 'fa-chain-broken' : params.ignoreSimilarity, 'fa-chain' : !params.ignoreSimilarity }"></i>
+            </a>
+        </p>
+    </div>
+</div>
+
 <!-- missing.tags -->
 <div class="form-group" ng-class="{ 'has-error' : observableForm.tags.$invalid && !observableForm.tagsInput.$pristine }">
     <label class="col-md-3 control-label">