diff --git a/app/controllers/seminars_controller.rb b/app/controllers/seminars_controller.rb
index f7718c3..afcc20f 100644
--- a/app/controllers/seminars_controller.rb
+++ b/app/controllers/seminars_controller.rb
@@ -495,7 +495,10 @@ class SeminarsController < ApplicationController
         end
       end
     end
-    @signup = SeminarSignup.where(name: params[:seminar_signup][:name], email: params[:seminar_signup][:email], seminar_main_id: seminar_id ).first
+    @signup = SeminarSignup.where(email: params[:seminar_signup][:email], seminar_main_id: seminar_id ).first
+    if @signup.blank?
+      @signup = SeminarSignup.where(name: params[:seminar_signup][:name], seminar_main_id: seminar_id ).first
+    end
 
     @seminar_signup = SeminarSignup.new(seminar_signup_params)
     not_signup_yet = @signup.blank?