diff --git a/src/Mapper/TaskNoteEntityToApiMapper.php b/src/Mapper/TaskNoteEntityToApiMapper.php
index 2de069c..046e2b0 100644
--- a/src/Mapper/TaskNoteEntityToApiMapper.php
+++ b/src/Mapper/TaskNoteEntityToApiMapper.php
@@ -47,13 +47,15 @@ class TaskNoteEntityToApiMapper implements MapperInterface
             MicroMapperInterface::MAX_DEPTH => 1,
         ]);
 
-        $dto->contact = $this->microMapper->map($entity->getContact(), ContactApi::class, [
-            MicroMapperInterface::MAX_DEPTH => 1,
-        ]);
+        if ($entity->getContact() !== null) {
+            $dto->contact = $this->microMapper->map($entity->getContact(), ContactApi::class, [
+                MicroMapperInterface::MAX_DEPTH => 1,
+            ]);
 
-        $dto->contactIri = $this->microMapper->map($entity->getContact(), ContactApi::class, [
-            MicroMapperInterface::MAX_DEPTH => 1,
-        ]);
+            $dto->contactIri = $this->microMapper->map($entity->getContact(), ContactApi::class, [
+                MicroMapperInterface::MAX_DEPTH => 1,
+            ]);
+        }
 
         $dto->contactType = $entity->getType();