diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 7e3ab8e8f6..3fd46e6365 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -3611,6 +3611,7 @@ phutil_register_library_map(array(
       1 => 'PhabricatorPolicyInterface',
       2 => 'PhabricatorSubscribableInterface',
       3 => 'PhabricatorApplicationTransactionInterface',
+      4 => 'PhabricatorDestructableInterface',
     ),
     'LegalpadDocumentBody' =>
     array(
diff --git a/src/applications/legalpad/storage/LegalpadDocument.php b/src/applications/legalpad/storage/LegalpadDocument.php
index 4f8378f0a1..a29047c4e8 100644
--- a/src/applications/legalpad/storage/LegalpadDocument.php
+++ b/src/applications/legalpad/storage/LegalpadDocument.php
@@ -4,7 +4,8 @@ final class LegalpadDocument extends LegalpadDAO
   implements
     PhabricatorPolicyInterface,
     PhabricatorSubscribableInterface,
-    PhabricatorApplicationTransactionInterface {
+    PhabricatorApplicationTransactionInterface,
+    PhabricatorDestructableInterface {
 
   protected $title;
   protected $contributorCount;
@@ -170,4 +171,31 @@ final class LegalpadDocument extends LegalpadDAO
     return new LegalpadTransaction();
   }
 
+
+/* -(  PhabricatorDestructableInterface  )----------------------------------- */
+
+
+  public function destroyObjectPermanently(
+    PhabricatorDestructionEngine $engine) {
+
+    $this->openTransaction();
+      $this->delete();
+
+      $bodies = id(new LegalpadDocumentBody())->loadAllWhere(
+        'documentPHID = %s',
+        $this->getPHID());
+      foreach ($bodies as $body) {
+        $body->delete();
+      }
+
+      $signatures = id(new LegalpadDocumentSignature())->loadAllWhere(
+        'documentPHID = %s',
+        $this->getPHID());
+      foreach ($signatures as $signature) {
+        $signature->delete();
+      }
+
+    $this->saveTransaction();
+  }
+
 }