diff --git a/app/controllers/api/v1/registrant/domains_controller.rb b/app/controllers/api/v1/registrant/domains_controller.rb
index 390148488..73b534598 100644
--- a/app/controllers/api/v1/registrant/domains_controller.rb
+++ b/app/controllers/api/v1/registrant/domains_controller.rb
@@ -7,6 +7,7 @@ module Api
         def index
           limit = params[:limit] || 200
           offset = params[:offset] || 0
+          simple = params[:simple] == 'true' || false
 
           if limit.to_i > 200 || limit.to_i < 1
             render(json: { errors: [{ limit: ['parameter is out of range'] }] },
@@ -20,7 +21,7 @@ module Api
 
           domains = current_user_domains
           serialized_domains = domains.limit(limit).offset(offset).map do |item|
-            serializer = Serializers::RegistrantApi::Domain.new(item, simplify: true)
+            serializer = Serializers::RegistrantApi::Domain.new(item, simplify: simple)
             serializer.to_json
           end
 
diff --git a/lib/serializers/registrant_api/domain.rb b/lib/serializers/registrant_api/domain.rb
index f0c9c1876..29362ad5c 100644
--- a/lib/serializers/registrant_api/domain.rb
+++ b/lib/serializers/registrant_api/domain.rb
@@ -9,18 +9,23 @@ module Serializers
       end
 
       def to_json
-        if simplify
+        if @simplify
           return {
             id: domain.uuid,
             name: domain.name,
             registered_at: domain.registered_at,
             valid_to: domain.valid_to,
+            outzone_at: domain.outzone_at,
             registrant_verification_asked_at: domain.registrant_verification_asked_at,
             statuses: domain.statuses,
             registrar: {
               name: domain.registrar.name,
-              website: domain.registrar.website
-            }
+              website: domain.registrar.website,
+            },
+            registrant: {
+              name: domain.registrant.name,
+              id: domain.registrant.uuid,
+            },
           }
         end