diff --git a/app/views/letters/_letter.json.jbuilder b/app/views/letters/_letter.json.jbuilder
index 90a567a..88bb053 100644
--- a/app/views/letters/_letter.json.jbuilder
+++ b/app/views/letters/_letter.json.jbuilder
@@ -79,6 +79,8 @@ json.repositories do
   end
 end
 
+json.set! 'previously_published', letter.letter_publisher.label if letter.letter_publisher.present?
+
 json.set! 'publication_information', letter.publication_information if letter.publication_information.present?
 
 json.recipients do
diff --git a/spec/requests/letters_spec.rb b/spec/requests/letters_spec.rb
index f752285..04ef8bf 100644
--- a/spec/requests/letters_spec.rb
+++ b/spec/requests/letters_spec.rb
@@ -168,6 +168,7 @@
       expect(letter.published).to be(true)
       get letter_url(letter), as: :json
       expect(json[:repositories]).to be_nil
+      expect(json[:previously_published]).to eq(letter.letter_publisher.label)
     end
 
     it 'renders unpublished when requested from beckettapi' do