diff --git a/app/models/verification/residence.rb b/app/models/verification/residence.rb
index 57bafa9a4..2587346b8 100644
--- a/app/models/verification/residence.rb
+++ b/app/models/verification/residence.rb
@@ -69,4 +69,8 @@ class Verification::Residence
       self.document_number = self.document_number.gsub(/[^a-z0-9]+/i, "").upcase unless self.document_number.blank?
     end
 
+    def self.valid_postal_codes
+      %w(28001 28002 28003 28004 28005 28006 28007 28008 28009 28010 28011 28012 28013 28014 28015 28016 28017 28018 28019 28020 28021 28022 28023 28024 28025 28026 28027 28028 28029 28030 28031 28032 28033 28034 28035 28036 28037 28038 28039 28040 28041 28042 28043 28044 28045 28046 28047 28048 28049 28050 28051 28052 28053 28054 28055 28790)
+    end
+
 end