diff --git a/src/seasidecache.cpp b/src/seasidecache.cpp
index bc14ce3..f54da0e 100644
--- a/src/seasidecache.cpp
+++ b/src/seasidecache.cpp
@@ -529,8 +529,11 @@ void SeasideCache::updateContactData(
         models.at(i)->sourceDataChanged(row, row);
 }
 
-void SeasideCache::removeContact(const QContact &contact)
+bool SeasideCache::removeContact(const QContact &contact)
 {
+    if (!validId(contact.id()))
+        return false;
+
     ContactIdType id = apiId(contact);
 
     instancePtr->m_contactsToRemove.append(id);
@@ -539,6 +542,7 @@ void SeasideCache::removeContact(const QContact &contact)
     instancePtr->removeContactData(id, FilterAll);
 
     instancePtr->requestUpdate();
+    return true;
 }
 
 void SeasideCache::removeContactData(
@@ -558,24 +562,30 @@ void SeasideCache::removeContactData(
         models.at(i)->sourceItemsRemoved();
 }
 
-void SeasideCache::fetchConstituents(const QContact &contact)
+bool SeasideCache::fetchConstituents(const QContact &contact)
 {
     QContactId personId(contact.id());
+    if (!validId(personId))
+        return false;
 
     if (!instancePtr->m_contactsToFetchConstituents.contains(personId)) {
         instancePtr->m_contactsToFetchConstituents.append(personId);
         instancePtr->requestUpdate();
     }
+    return true;
 }
 
-void SeasideCache::fetchMergeCandidates(const QContact &contact)
+bool SeasideCache::fetchMergeCandidates(const QContact &contact)
 {
     QContactId personId(contact.id());
+    if (!validId(personId))
+        return false;
 
     if (!instancePtr->m_contactsToFetchCandidates.contains(personId)) {
         instancePtr->m_contactsToFetchCandidates.append(personId);
         instancePtr->requestUpdate();
     }
+    return true;
 }
 
 const QVector<SeasideCache::ContactIdType> *SeasideCache::contacts(FilterType type)
diff --git a/src/seasidecache.h b/src/seasidecache.h
index ea4c7e5..126ad7b 100644
--- a/src/seasidecache.h
+++ b/src/seasidecache.h
@@ -203,13 +203,13 @@ class CONTACTCACHE_EXPORT SeasideCache : public QObject
     static CacheItem *itemByPhoneNumber(const QString &msisdn);
     static CacheItem *itemByEmailAddress(const QString &email);
     static bool saveContact(const QContact &contact);
-    static void removeContact(const QContact &contact);
+    static bool removeContact(const QContact &contact);
 
     static void aggregateContacts(const QContact &contact1, const QContact &contact2);
     static void disaggregateContacts(const QContact &contact1, const QContact &contact2);
 
-    static void fetchConstituents(const QContact &contact);
-    static void fetchMergeCandidates(const QContact &contact);
+    static bool fetchConstituents(const QContact &contact);
+    static bool fetchMergeCandidates(const QContact &contact);
 
     static int importContacts(const QString &path);
     static QString exportContacts();