diff --git a/lib/pocus/resource.rb b/lib/pocus/resource.rb
index 971d17e..1ee1cea 100644
--- a/lib/pocus/resource.rb
+++ b/lib/pocus/resource.rb
@@ -106,7 +106,8 @@ def post
     def post_multiple(request_path, klass, fields_multiple)
       data = fields_multiple.map { |fields| camelize_fields(fields) }
       response = session.send_request('POST', path + request_path, data)
-      resources = response.fetch(klass.tag_multiple).map { |fields| klass.new(fields.merge(parent: self)) }
+      data = response.fetch(klass.tag_multiple) || []
+      resources = data.map { |fields| klass.new(fields.merge(parent: self)) }
       ResponseArray.new(resources, response['errors'], response['warnings'])
     end
 
diff --git a/spec/lib/pocus/contact_spec.rb b/spec/lib/pocus/contact_spec.rb
index fb23feb..966934c 100644
--- a/spec/lib/pocus/contact_spec.rb
+++ b/spec/lib/pocus/contact_spec.rb
@@ -56,6 +56,15 @@
       expect(contact).to be_kind_of(Pocus::Contact)
       expect(contact.contact_id).to match(/^\d+$/)
     end
+
+    it 'handles error on all contacts' do
+      fields_multiple = [''].map do |i|
+        contact_attributes.dup.merge(email: "#{i}@dummy.com")
+      end
+      response = test_folder.contacts.create(fields_multiple)
+      expect(response.warnings.count).to be >= 1
+      expect(response.first).to eq(nil)
+    end
   end
 
   describe '#reload' do