diff --git a/CRM/Twingle/Form/Profile.php b/CRM/Twingle/Form/Profile.php
index be31ffb..c965b3f 100644
--- a/CRM/Twingle/Form/Profile.php
+++ b/CRM/Twingle/Form/Profile.php
@@ -224,6 +224,15 @@ class CRM_Twingle_Form_Profile extends CRM_Core_Form {
       array('class' => 'crm-select2 huge')
     );
 
+    $this->add(
+      'select', // field type
+      'membership_type_id', // field name
+      E::ts('Create membership of type'), // field label
+      array('' => E::ts('- none -')) + $this->getMembershipTypes(), // list of options
+      FALSE, // is not required
+      array('class' => 'crm-select2 huge')
+    );
+
     $this->add(
       'text', // field type
       'contribution_source', // field name
@@ -417,6 +426,27 @@ class CRM_Twingle_Form_Profile extends CRM_Core_Form {
     return $financial_types;
   }
 
+  /**
+   * Retrieves membership types present within the system as options for select
+   * form elements.
+   *
+   * @return array
+   *
+   * @throws \CiviCRM_API3_Exception
+   */
+  public function getMembershipTypes() {
+    $membership_types = array();
+    $query = civicrm_api3('MembershipType', 'get', array(
+      'is_active'    => 1,
+      'option.limit' => 0,
+      'return'       => 'id,name'
+    ));
+    foreach ($query['values'] as $type) {
+      $membership_types[$type['id']] = $type['name'];
+    }
+    return $membership_types;
+  }
+
   /**
    * Retrieves campaigns present within the system as options for select form
    * elements.
diff --git a/CRM/Twingle/Profile.php b/CRM/Twingle/Profile.php
index 7286a23..a2d993e 100644
--- a/CRM/Twingle/Profile.php
+++ b/CRM/Twingle/Profile.php
@@ -207,6 +207,7 @@ class CRM_Twingle_Profile {
       'campaign',
       'contribution_source',
       'custom_field_mapping',
+      'membership_type_id',
     );
   }
 
@@ -267,6 +268,7 @@ class CRM_Twingle_Profile {
       'campaign' => NULL,
       'contribution_source' => NULL,
       'custom_field_mapping' => NULL,
+      'membership_type_id' => NULL,
     ));
   }
 
diff --git a/api/v3/TwingleDonation/Submit.php b/api/v3/TwingleDonation/Submit.php
index e6209da..fad4d93 100644
--- a/api/v3/TwingleDonation/Submit.php
+++ b/api/v3/TwingleDonation/Submit.php
@@ -265,6 +265,9 @@ function civicrm_api3_twingle_donation_Submit($params) {
     // Copy submitted parameters.
     $original_params = $params;
 
+    // Prepare results array.
+    $result_values = array();
+
     // Get the profile defined for the given form ID, or the default profile
     // if none matches.
     $profile = CRM_Twingle_Profile::getProfileForProject($params['project_id']);
@@ -460,6 +463,11 @@ function civicrm_api3_twingle_donation_Submit($params) {
       }
     }
 
+    $result_values['contact'] = $contact_id;
+    if (isset($organisation_id)) {
+      $result_values['organization'] = $organisation_id;
+    }
+
     // If requested, add contact to newsletter groups defined in the profile.
     if (!empty($params['newsletter']) && !empty($groups = $profile->getAttribute('newsletter_groups'))) {
       foreach ($groups as $group_id) {
@@ -467,6 +475,8 @@ function civicrm_api3_twingle_donation_Submit($params) {
           'group_id' => $group_id,
           'contact_id' => $contact_id,
         ));
+
+        $result_values['newsletter'][] = $group_id;
       }
     }
 
@@ -477,6 +487,8 @@ function civicrm_api3_twingle_donation_Submit($params) {
           'group_id' => $group_id,
           'contact_id' => $contact_id,
         ));
+
+        $result_values['postinfo'][] = $group_id;
       }
     }
 
@@ -488,6 +500,8 @@ function civicrm_api3_twingle_donation_Submit($params) {
           'group_id' => $group_id,
           'contact_id' => $contact_id,
         ));
+
+        $result_values['donation_receipt'][] = $group_id;
       }
     }
 
@@ -581,7 +595,7 @@ function civicrm_api3_twingle_donation_Submit($params) {
       // Create the mandate.
       $mandate = civicrm_api3('SepaMandate', 'createfull', $mandate_data);
 
-      $result_values = $mandate['values'];
+      $result_values['sepa_mandate'] = $mandate['values'];
     }
     else {
       // Create (recurring) contribution.
@@ -629,7 +643,17 @@ function civicrm_api3_twingle_donation_Submit($params) {
         );
       }
 
-      $result_values = $contribution['values'];
+      $result_values['contribution'] = $contribution['values'];
+    }
+
+    // Create membership if a membership type is configured within the profile.
+    if (!empty($membership_type_id = $profile->getAttribute('membership_type_id'))) {
+      $membership = civicrm_api3('Membership', 'create', array(
+        'contact_id' => $contact_id,
+        'membership_type_id' => $membership_type_id,
+      ));
+
+      $result_values['membership'] = $membership;
     }
 
     $result = civicrm_api3_create_success($result_values);
diff --git a/templates/CRM/Twingle/Form/Profile.tpl b/templates/CRM/Twingle/Form/Profile.tpl
index 0835359..ae79e64 100644
--- a/templates/CRM/Twingle/Form/Profile.tpl
+++ b/templates/CRM/Twingle/Form/Profile.tpl
@@ -185,6 +185,11 @@
           <td class="content">{$form.campaign.html}</td>
         </tr>
 
+        <tr class="crm-section">
+          <td class="label">{$form.membership_type_id.label}</td>
+          <td class="content">{$form.membership_type_id.html}</td>
+        </tr>
+
         <tr class="crm-section">
           <td class="label">{$form.contribution_source.label}</td>
           <td class="content">{$form.contribution_source.html}</td>