diff --git a/app/celery/tasks.py b/app/celery/tasks.py
index f746512be..cdf5dc7d2 100644
--- a/app/celery/tasks.py
+++ b/app/celery/tasks.py
@@ -274,6 +274,7 @@ def build_dvla_file(self, job_id):
                     # This unique id is a 7 digits requested by DVLA, not known
                     # if this number needs to be sequential.
                     numeric_id=random.randint(1, int('9' * 7)),
+                    contact_block=notification.service.letter_contact_block,
                 ))
                 for notification in dao_get_all_notifications_for_job(job_id)
             )
diff --git a/tests/app/celery/test_tasks.py b/tests/app/celery/test_tasks.py
index 80b83756c..671d52189 100644
--- a/tests/app/celery/test_tasks.py
+++ b/tests/app/celery/test_tasks.py
@@ -994,6 +994,7 @@ def test_build_dvla_file(sample_letter_template, mocker):
 
     # Named arguments
     assert mocked_letter_template.call_args[1]['numeric_id'] == 999
+    assert mocked_letter_template.call_args[1]['contact_block'] == 'London,\nSW1A 1AA'
 
 
 def test_build_dvla_file_retries_if_all_notifications_are_not_created(sample_letter_template, mocker):
diff --git a/tests/app/conftest.py b/tests/app/conftest.py
index 387bb33eb..0805242b7 100644
--- a/tests/app/conftest.py
+++ b/tests/app/conftest.py
@@ -134,7 +134,8 @@ def sample_service(
         'message_limit': limit,
         'restricted': restricted,
         'email_from': email_from,
-        'created_by': user
+        'created_by': user,
+        'letter_contact_block': 'London,\nSW1A 1AA',
     }
     service = Service.query.filter_by(name=service_name).first()
     if not service: