diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index feb2a7677..7e2e2d535 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -83,4 +83,9 @@ module ApplicationHelper
       version.object_changes.to_h.slice(*attrs).any? && css_class
     end
   end
+
+  def legal_document_types
+    types = LegalDocument::TYPES.dup
+    ".#{types.join(',.')}"
+  end
 end
diff --git a/app/helpers/default_form_builder.rb b/app/helpers/default_form_builder.rb
new file mode 100644
index 000000000..735317198
--- /dev/null
+++ b/app/helpers/default_form_builder.rb
@@ -0,0 +1,6 @@
+class DefaultFormBuilder < ActionView::Helpers::FormBuilder
+  def legal_document_field(method, options = {})
+    self.multipart = true
+    @template.legal_document_field(@object_name, method, objectify_options(options))
+  end
+end
diff --git a/app/helpers/form_helper.rb b/app/helpers/form_helper.rb
new file mode 100644
index 000000000..a3a139e09
--- /dev/null
+++ b/app/helpers/form_helper.rb
@@ -0,0 +1,8 @@
+module FormHelper
+  def legal_document_field(object_name, method, options = {})
+    options[:data] = { legal_document: true }
+    options[:accept] = legal_document_types unless options[:accept]
+
+    file_field(object_name, method, options)
+  end
+end
diff --git a/app/helpers/form_tag_helper.rb b/app/helpers/form_tag_helper.rb
new file mode 100644
index 000000000..d19a59db5
--- /dev/null
+++ b/app/helpers/form_tag_helper.rb
@@ -0,0 +1,8 @@
+module FormTagHelper
+  def legal_document_field_tag(name, options = {})
+    options[:data] = { legal_document: true }
+    options[:accept] = legal_document_types unless options[:accept]
+
+    file_field_tag(name, options)
+  end
+end
diff --git a/config/application.rb b/config/application.rb
index 109fa4d1b..e946f5d11 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -78,6 +78,8 @@ module Registry
       domain:               ENV['smtp_domain'],
       openssl_verify_mode:  ENV['smtp_openssl_verify_mode']
     }
+
+    config.action_view.default_form_builder = 'DefaultFormBuilder'
   end
 end