diff --git a/CRM/TwingleCampaign/BAO/TwingleCampaign.php b/CRM/TwingleCampaign/BAO/TwingleCampaign.php
index 1e773c2..2cbc865 100644
--- a/CRM/TwingleCampaign/BAO/TwingleCampaign.php
+++ b/CRM/TwingleCampaign/BAO/TwingleCampaign.php
@@ -32,15 +32,30 @@ class CRM_TwingleCampaign_BAO_TwingleCampaign {
     $this->id = $values['id'] ?? NULL;
     $this->values['campaign_type_id'] = 'twingle_campaign';
 
+    // If there is already an ID for this TwingleProject, get its values from
+    // the database
     if ($this->id != NULL) {
       $this->fetch($this->id);
     }
+
+    // Update the campaign values
     $this->update($values);
 
+    // Get the parent TwingleProject
+    // (it doesn't matter how many levels above in the campaign tree it is)
     $this->getParentProject();
-    if (!isset($this->values['cid'])) {
+
+    // If this is a new TwingleCampaign or if it is a cloned TwingleCampaign,
+    // calculate a cid
+    if (
+      !isset($this->values['cid']) ||
+      (isset($values['clone']) && $values['clone'])
+    ) {
       $this->createCid();
     }
+
+    // Create an url from the parent TwingleProject url and the cid of this
+    // TwingleCampaign
     $this->createUrl();
   }
 
@@ -351,20 +366,6 @@ class CRM_TwingleCampaign_BAO_TwingleCampaign {
     }
   }
 
-  /**
-   * ## Clone this TwingleProject
-   *
-   * This method removes the id from this instance and in the next step it
-   * creates the clone as a new TwingleCampaign with the same values to
-   * Twingle.
-   *
-   * @throws \CiviCRM_API3_Exception
-   */
-  public
-  function clone() {
-    // TODO: implement cloning
-  }
-
   /**
    * ## Get ID
    *
diff --git a/api/v3/TwingleCampaign/Create.php b/api/v3/TwingleCampaign/Create.php
index d4d9db8..e42c00a 100644
--- a/api/v3/TwingleCampaign/Create.php
+++ b/api/v3/TwingleCampaign/Create.php
@@ -40,6 +40,13 @@ function _civicrm_api3_twingle_campaign_Create_spec(array &$spec) {
     'api.required' => 1,
     'description'  => E::ts('Optional parent id for this Campaign'),
   ];
+  $spec['clone'] = [
+    'name'         => 'clone',
+    'title'        => E::ts('Clone'),
+    'type'         => CRM_Utils_Type::T_BOOLEAN,
+    'api.required' => 0,
+    'description'  => E::ts('Set this value to true if this campaign is about to be cloned to recreate cid'),
+  ];
 }
 
 
diff --git a/l10n/de_DE/LC_MESSAGES/de_DE.mo b/l10n/de_DE/LC_MESSAGES/de_DE.mo
index b69812f..7a64892 100644
Binary files a/l10n/de_DE/LC_MESSAGES/de_DE.mo and b/l10n/de_DE/LC_MESSAGES/de_DE.mo differ
diff --git a/l10n/de_DE/LC_MESSAGES/de_DE.po b/l10n/de_DE/LC_MESSAGES/de_DE.po
index 5736cb0..5f83de4 100644
--- a/l10n/de_DE/LC_MESSAGES/de_DE.po
+++ b/l10n/de_DE/LC_MESSAGES/de_DE.po
@@ -3,14 +3,14 @@ msgstr ""
 "Project-Id-Version: \n"
 "POT-Creation-Date: \n"
 "PO-Revision-Date: \n"
+"Last-Translator: \n"
 "Language-Team: \n"
+"Language: de_DE\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"X-Generator: Poedit 2.4.3\n"
-"Last-Translator: \n"
+"X-Generator: Poedit 3.0\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
-"Language: de_DE\n"
 
 #: CRM/TwingleCampaign/BAO/CustomField.php
 msgid ""
@@ -907,6 +907,17 @@ msgstr "Elternkampagne"
 msgid "Optional parent id for this Campaign"
 msgstr "Optionale Eltern-ID für diese Kampagne"
 
+#: api/v3/TwingleCampaign/Create.php
+msgid "Clone"
+msgstr "Klonen"
+
+#: api/v3/TwingleCampaign/Create.php
+msgid ""
+"Set this value to true if this campaign is about to be cloned to recreate cid"
+msgstr ""
+"Setze diesen Wert auf true, wenn diese Kampagne gerade geklont wird, damit "
+"die cid neu berechnet wird"
+
 #: api/v3/TwingleCampaign/Get.php api/v3/TwingleCampaign/Getsingle.php
 msgid "Twingle Campaign CID"
 msgstr "Twingle Campaign CID"
@@ -1197,6 +1208,10 @@ msgstr "Twingle Event Einstellungen"
 msgid "Campaign cloning failed"
 msgstr "Klonen der Kampagne fehlgeschlagen"
 
+#: twinglecampaign.php
+msgid "TwingleCampaign was cloned."
+msgstr "TwingleCampaign wurde geklont"
+
 #: twinglecampaign.php
 msgid "TwingleCampaign update failed"
 msgstr "TwingleCampaign-Update fehlgeschlagen"
diff --git a/l10n/pot/twinglecampaign.pot b/l10n/pot/twinglecampaign.pot
index 156eafd..62ac159 100644
--- a/l10n/pot/twinglecampaign.pot
+++ b/l10n/pot/twinglecampaign.pot
@@ -806,6 +806,14 @@ msgstr ""
 msgid "Optional parent id for this Campaign"
 msgstr ""
 
+#: ./api/v3/TwingleCampaign/Create.php
+msgid "Clone"
+msgstr ""
+
+#: ./api/v3/TwingleCampaign/Create.php
+msgid "Set this value to true if this campaign is about to be cloned to recreate cid"
+msgstr ""
+
 #: ./api/v3/TwingleCampaign/Get.php ./api/v3/TwingleCampaign/Getsingle.php
 msgid "Twingle Campaign CID"
 msgstr ""
@@ -1038,6 +1046,10 @@ msgstr ""
 msgid "Campaign cloning failed"
 msgstr ""
 
+#: ./twinglecampaign.php
+msgid "TwingleCampaign was cloned."
+msgstr ""
+
 #: ./twinglecampaign.php
 msgid "TwingleCampaign update failed"
 msgstr ""
diff --git a/twinglecampaign.php b/twinglecampaign.php
index a6a9b31..195ceb4 100644
--- a/twinglecampaign.php
+++ b/twinglecampaign.php
@@ -180,6 +180,19 @@ function twinglecampaign_postSave_campaign_update_callback(
         );
       }
     }
+    if ($_POST['action'] == 'clone' && $entity == 'TwingleCampaign') {
+      unset($_POST['action']);
+      try {
+        civicrm_api3('TwingleCampaign', 'create',
+          ['id' => $campaign_id, 'clone' => true]
+        );
+        CRM_Utils_System::setUFMessage(E::ts('TwingleCampaign was cloned.'));
+      } catch (CiviCRM_API3_Exception $e) {
+        Civi::log()->error(
+          'twinglecampaign_postSave_callback ' . $e->getMessage()
+        );
+      }
+    }
   }
 
   // If a TwingleProject is getting saved