diff --git a/app/models/spending_proposal.rb b/app/models/spending_proposal.rb
index f4657e9d4..c49b745e1 100644
--- a/app/models/spending_proposal.rb
+++ b/app/models/spending_proposal.rb
@@ -123,7 +123,7 @@ class SpendingProposal < ActiveRecord::Base
   end
 
   def set_responsible_name
-    self.responsible_name = author.try(:username)
+    self.responsible_name = author.try(:document_number)
   end
 
 end
diff --git a/spec/models/spending_proposal_spec.rb b/spec/models/spending_proposal_spec.rb
index d841abf06..3d32e383b 100644
--- a/spec/models/spending_proposal_spec.rb
+++ b/spec/models/spending_proposal_spec.rb
@@ -262,10 +262,10 @@ describe SpendingProposal do
   end
 
   describe "responsible_name" do
-    it "gets updated with the user name" do
-      u = create(:user, username: "manolo")
+    it "gets updated with the document_number" do
+      u = create(:user, document_number: "123456")
       sp = create(:spending_proposal, author: u)
-      expect(sp.responsible_name).to eq("manolo")
+      expect(sp.responsible_name).to eq("123456")
     end
   end