diff --git a/src/akonadi/akonadiserializer.h b/src/akonadi/akonadiserializer.h
--- a/src/akonadi/akonadiserializer.h
+++ b/src/akonadi/akonadiserializer.h
@@ -43,6 +43,7 @@
     bool representsAkonadiTag(Domain::Tag::Ptr tag, Akonadi::Tag akonadiTag) const Q_DECL_OVERRIDE;
 
     QString objectUid(QObjectPtr object) Q_DECL_OVERRIDE;
+    QString itemUid(const Item &item) Q_DECL_OVERRIDE;
 
     Domain::DataSource::Ptr createDataSourceFromCollection(Akonadi::Collection collection, DataSourceNameScheme naming) Q_DECL_OVERRIDE;
     void updateDataSourceFromCollection(Domain::DataSource::Ptr dataSource, Akonadi::Collection collection, DataSourceNameScheme naming) Q_DECL_OVERRIDE;
diff --git a/src/akonadi/akonadiserializer.cpp b/src/akonadi/akonadiserializer.cpp
--- a/src/akonadi/akonadiserializer.cpp
+++ b/src/akonadi/akonadiserializer.cpp
@@ -69,6 +69,16 @@
     return object->property("todoUid").toString();
 }
 
+QString Serializer::itemUid(const Item &item)
+{
+    if (isTaskItem(item)) {
+        const auto todo = item.payload<KCalCore::Todo::Ptr>();
+        return todo->uid();
+    } else {
+        return QString();
+    }
+}
+
 Domain::DataSource::Ptr Serializer::createDataSourceFromCollection(Collection collection, DataSourceNameScheme naming)
 {
     if (!collection.isValid())
diff --git a/src/akonadi/akonadiserializerinterface.h b/src/akonadi/akonadiserializerinterface.h
--- a/src/akonadi/akonadiserializerinterface.h
+++ b/src/akonadi/akonadiserializerinterface.h
@@ -58,6 +58,7 @@
     virtual bool representsAkonadiTag(Domain::Tag::Ptr tag, Akonadi::Tag akonadiTag) const = 0;
 
     virtual QString objectUid(QObjectPtr object) = 0;
+    virtual QString itemUid(const Item &item) = 0;
 
     virtual Domain::DataSource::Ptr createDataSourceFromCollection(Akonadi::Collection collection, DataSourceNameScheme naming) = 0;
     virtual void updateDataSourceFromCollection(Domain::DataSource::Ptr dataSource, Akonadi::Collection collection, DataSourceNameScheme naming) = 0;
diff --git a/tests/units/akonadi/akonadiserializertest.cpp b/tests/units/akonadi/akonadiserializertest.cpp
--- a/tests/units/akonadi/akonadiserializertest.cpp
+++ b/tests/units/akonadi/akonadiserializertest.cpp
@@ -132,6 +132,47 @@
         QCOMPARE(serializer.objectUid(object), QStringLiteral("my-uid"));
     }
 
+    void shouldKnowTaskItemUid_data()
+    {
+        QTest::addColumn<Akonadi::Item>("item");
+        QTest::addColumn<QString>("expectedUid");
+
+        Akonadi::Item item1;
+        KCalCore::Todo::Ptr todo1(new KCalCore::Todo);
+        todo1->setUid(QString());
+        item1.setPayload<KCalCore::Todo::Ptr>(todo1);
+
+        Akonadi::Item item2;
+        KCalCore::Todo::Ptr todo2(new KCalCore::Todo);
+        todo2->setUid(QStringLiteral("1"));
+        item2.setPayload<KCalCore::Todo::Ptr>(todo2);
+
+        Akonadi::Item item3;
+        KMime::Message::Ptr message(new KMime::Message);
+        message->subject(true)->fromUnicodeString(QStringLiteral("foo"), "utf-8");
+        message->mainBodyPart()->fromUnicodeString(QStringLiteral("bar"));
+        item3.setMimeType(Akonadi::NoteUtils::noteMimeType());
+        item3.setPayload<KMime::Message::Ptr>(message);
+
+        QTest::newRow("task without uid") << item1 << QString();
+        QTest::newRow("task with uid") << item2 << "1";
+        QTest::newRow("note") << item3 << QString();
+    }
+
+    void shouldKnowTaskItemUid()
+    {
+        // GIVEN
+        QFETCH(Akonadi::Item, item);
+        QFETCH(QString, expectedUid);
+
+        // WHEN
+        Akonadi::Serializer serializer;
+        QString uid = serializer.itemUid(item);
+
+        // THEN
+        QCOMPARE(uid, expectedUid);
+    }
+
     void shouldCreateDataSourceFromCollection_data()
     {
         QTest::addColumn<QString>("name");