diff --git a/api/preprints/serializers.py b/api/preprints/serializers.py
index e07f79ca8570..5c6d72588831 100644
--- a/api/preprints/serializers.py
+++ b/api/preprints/serializers.py
@@ -206,6 +206,16 @@ class PreprintSerializer(TaxonomizableSerializerMixin, MetricsSerializerMixin, J
         ),
     )
 
+    affiliated_institutions = RelationshipField(
+        related_view='preprints:preprints-institutions',
+        related_view_kwargs={'preprint_id': '<_id>'},
+        self_view='preprints:preprints-institutions',
+        self_view_kwargs={'preprint_id': '<_id>'},
+        read_only=False,
+        required=False,
+        allow_null=True,
+    )
+
     links = LinksField(
         {
             'self': 'get_preprint_url',
diff --git a/api_tests/preprints/views/test_preprint_detail.py b/api_tests/preprints/views/test_preprint_detail.py
index 7112a1a21e6f..2b915796d3d9 100644
--- a/api_tests/preprints/views/test_preprint_detail.py
+++ b/api_tests/preprints/views/test_preprint_detail.py
@@ -28,6 +28,7 @@
     ProjectFactory,
     SubjectFactory,
     PreprintProviderFactory,
+    InstitutionFactory
 )
 from website.settings import DOI_FORMAT, CROSSREF_URL
 
@@ -58,6 +59,10 @@ class TestPreprintDetail:
     def preprint(self, user):
         return PreprintFactory(creator=user)
 
+    @pytest.fixture()
+    def institution(self):
+        return InstitutionFactory(creator=user)
+
     @pytest.fixture()
     def preprint_pre_mod(self, user):
         return PreprintFactory(reviews_workflow='pre-moderation', is_published=False, creator=user)
@@ -215,6 +220,16 @@ def test_preprint_embed_identifiers(self, app, user, preprint, url):
         link = res.json['data']['relationships']['identifiers']['links']['related']['href']
         assert f'{url}identifiers/' in link
 
+    def test_return_affiliated_institutions(self, app, user, preprint, institution, url):
+        """
+        Confirmation test for the the new preprint affiliated institutions feature
+        """
+        preprint.affiliated_institutions.add(institution)
+        res = app.get(url)
+        assert res.status_code == 200
+        relationship_link = res.json['data']['relationships']['affiliated_institutions']['links']['related']['href']
+        assert f'/v2/preprints/{preprint._id}/institutions/' in relationship_link
+
 
 @pytest.mark.django_db
 class TestPreprintDelete:
diff --git a/api_tests/preprints/views/test_preprint_list.py b/api_tests/preprints/views/test_preprint_list.py
index 81fdde05f797..305dca450d5c 100644
--- a/api_tests/preprints/views/test_preprint_list.py
+++ b/api_tests/preprints/views/test_preprint_list.py
@@ -26,6 +26,7 @@
     AuthUserFactory,
     SubjectFactory,
     PreprintProviderFactory,
+    InstitutionFactory,
 )
 from tests.base import ApiTestCase, capture_signals
 from website.project import signals as project_signals
@@ -145,6 +146,7 @@ class TestPreprintList(ApiTestCase):
     def setUp(self):
         super().setUp()
         self.user = AuthUserFactory()
+        self.institution = InstitutionFactory()
 
         self.preprint = PreprintFactory(creator=self.user)
         self.url = f'/{API_BASE}preprints/'
@@ -184,6 +186,18 @@ def test_withdrawn_preprints_list(self):
         assert pp._id not in user_res_ids
         assert pp._id in mod_res_ids
 
+    def test_return_affiliated_institutions(self):
+        """
+        Confirmation test for the the new preprint affiliated institutions feature
+        """
+        self.preprint.affiliated_institutions.add(self.institution)
+        res = self.app.get(self.url)
+        assert len(res.json['data']) == 1
+        assert res.status_code == 200
+        assert res.content_type == 'application/vnd.api+json'
+        relationship_link = res.json['data'][0]['relationships']['affiliated_institutions']['links']['related']['href']
+        assert f'/v2/preprints/{self.preprint._id}/institutions/' in relationship_link
+
 
 class TestPreprintsListFiltering(PreprintsListFilteringMixin):