diff --git a/app/helpers/signature_sheets_helper.rb b/app/helpers/signature_sheets_helper.rb
index acd75a5ab..8e75dccfd 100644
--- a/app/helpers/signature_sheets_helper.rb
+++ b/app/helpers/signature_sheets_helper.rb
@@ -2,7 +2,7 @@ module SignatureSheetsHelper
 
   def signable_options
     [[t("activerecord.models.proposal", count: 1), Proposal],
-     [t("activerecord.models.spending_proposal", count: 1), SpendingProposal]]
+     [t("activerecord.models.budget/investment", count: 1), Budget::Investment]]
   end
 
 end
\ No newline at end of file
diff --git a/app/models/signature.rb b/app/models/signature.rb
index ece75773a..a645fbfb6 100644
--- a/app/models/signature.rb
+++ b/app/models/signature.rb
@@ -12,35 +12,30 @@ class Signature < ActiveRecord::Base
 
   before_validation :clean_document_number
 
-  def verified?
-    user_exists? || in_census?
-  end
-
   def verify
-    if verified?
-      assign_vote
-      mark_as_verified
-    end
-  end
-
-  def assign_vote
     if user_exists?
       assign_vote_to_user
+      mark_as_verified
     elsif in_census?
       create_user
       assign_vote_to_user
+      mark_as_verified
     end
   end
 
   def assign_vote_to_user
     set_user
-    signable.register_vote(user, "yes")
+    if signable.is_a? Budget::Investment
+      signable.vote_by(voter: user, vote: 'yes') if [nil, :no_selecting_allowed].include?(signable.reason_for_not_being_selectable_by(user))
+    else
+      signable.register_vote(user, "yes")
+    end
     assign_signature_to_vote
   end
 
   def assign_signature_to_vote
     vote = Vote.where(votable: signable, voter: user).first
-    vote.update(signature: self)
+    vote.update(signature: self) if vote
   end
 
   def user_exists?
diff --git a/app/models/signature_sheet.rb b/app/models/signature_sheet.rb
index 9720c891f..1434143ac 100644
--- a/app/models/signature_sheet.rb
+++ b/app/models/signature_sheet.rb
@@ -2,7 +2,7 @@ class SignatureSheet < ActiveRecord::Base
   belongs_to :signable, polymorphic: true
   belongs_to :author, class_name: 'User', foreign_key: 'author_id'
 
-  VALID_SIGNABLES = %w( Proposal SpendingProposal )
+  VALID_SIGNABLES = %w( Proposal Budget::Investment SpendingProposal )
 
   has_many :signatures
 
diff --git a/config/locales/activerecord.es.yml b/config/locales/activerecord.es.yml
index 7d47a8e30..76930d715 100644
--- a/config/locales/activerecord.es.yml
+++ b/config/locales/activerecord.es.yml
@@ -8,8 +8,8 @@ es:
         one: "Presupuesto participativo"
         other: "Presupuestos participativos"
       budget/investment:
-        one: "Propuesta de inversión"
-        other: "Propuestas de inversión"
+        one: "Proyecto de inversión"
+        other: "Proyectos de inversión"
       comment:
         one: "Comentario"
         other: "Comentarios"
diff --git a/spec/features/admin/signature_sheets_spec.rb b/spec/features/admin/signature_sheets_spec.rb
index 8243dd913..bcde7bfc0 100644
--- a/spec/features/admin/signature_sheets_spec.rb
+++ b/spec/features/admin/signature_sheets_spec.rb
@@ -19,20 +19,42 @@ feature 'Signature sheets' do
     end
   end
 
-  scenario 'Create' do
-    proposal = create(:proposal)
-    visit new_admin_signature_sheet_path
+  context 'Create' do
+    scenario 'Proposal' do
+      proposal = create(:proposal)
+      visit new_admin_signature_sheet_path
 
-    select "Citizen proposal", from: "signature_sheet_signable_type"
-    fill_in "signature_sheet_signable_id", with: proposal.id
-    fill_in "signature_sheet_document_numbers", with: "12345678Z, 99999999Z"
-    click_button "Create signature sheet"
+      select "Citizen proposal", from: "signature_sheet_signable_type"
+      fill_in "signature_sheet_signable_id", with: proposal.id
+      fill_in "signature_sheet_document_numbers", with: "12345678Z, 99999999Z"
+      click_button "Create signature sheet"
 
-    expect(page).to have_content "Signature sheet created successfully"
+      expect(page).to have_content "Signature sheet created successfully"
 
-    visit proposal_path(proposal)
+      visit proposal_path(proposal)
+
+      expect(page).to have_content "1 support"
+    end
+
+    scenario 'Budget Investment' do
+      investment = create(:budget_investment)
+      budget = investment.budget
+      budget.update(phase: 'selecting')
+
+      visit new_admin_signature_sheet_path
+
+      select "Investment", from: "signature_sheet_signable_type"
+      fill_in "signature_sheet_signable_id", with: investment.id
+      fill_in "signature_sheet_document_numbers", with: "12345678Z, 99999999Z"
+      click_button "Create signature sheet"
+
+      expect(page).to have_content "Signature sheet created successfully"
+
+      visit budget_investment_path(budget, investment)
+
+      expect(page).to have_content "1 support"
+    end
 
-    expect(page).to have_content "1 support"
   end
 
   scenario 'Errors on create' do
diff --git a/spec/models/signature_sheet_spec.rb b/spec/models/signature_sheet_spec.rb
index 473a7b96d..aeed78996 100644
--- a/spec/models/signature_sheet_spec.rb
+++ b/spec/models/signature_sheet_spec.rb
@@ -46,12 +46,20 @@ describe SignatureSheet do
 
       expect(signature_sheet.name).to eq("Citizen proposal #{proposal.id}")
     end
+
     it "returns name for spending proposal signature sheets" do
       spending_proposal = create(:spending_proposal)
       signature_sheet.signable = spending_proposal
 
       expect(signature_sheet.name).to eq("Spending proposal #{spending_proposal.id}")
     end
+
+    it "returns name for budget investment signature sheets" do
+      budget_investment = create(:budget_investment)
+      signature_sheet.signable = budget_investment
+
+      expect(signature_sheet.name).to eq("Investment #{budget_investment.id}")
+    end
   end
 
   describe "#verify_signatures" do
diff --git a/spec/models/signature_spec.rb b/spec/models/signature_spec.rb
index f1c81da19..207208bbf 100644
--- a/spec/models/signature_spec.rb
+++ b/spec/models/signature_spec.rb
@@ -46,49 +46,61 @@ describe Signature do
     end
   end
 
-  describe "#verified?" do
-
-    it "returns true if user exists" do
-      user = create(:user, :level_two, document_number: "123A")
-      signature = create(:signature, document_number: user.document_number)
-
-      expect(signature.verified?).to eq(true)
-    end
-
-    it "returns true if document number in census" do
-      signature = create(:signature, document_number: "12345678Z")
-
-      expect(signature.verified?).to eq(true)
-    end
-
-    it "returns false if user does not exist and not in census" do
-      signature = create(:signature, document_number: "123A")
-
-      expect(signature.verified?).to eq(false)
-    end
-
-  end
-
-  describe "#assign_vote" do
+  describe "#verify" do
 
     describe "existing user" do
 
-      it "assigns vote to user" do
+      it "assigns vote to user on proposal" do
         user = create(:user, :level_two, document_number: "123A")
         signature = create(:signature, document_number: user.document_number)
         proposal = signature.signable
 
-        signature.assign_vote
+        signature.verify
 
         expect(user.voted_for?(proposal)).to be
       end
 
+      it "assigns vote to user on budget investment" do
+        investment = create(:budget_investment)
+        signature_sheet = create(:signature_sheet, signable: investment)
+        user = create(:user, :level_two, document_number: "123A")
+        signature = create(:signature, document_number: user.document_number, signature_sheet: signature_sheet)
+
+        signature.verify
+
+        expect(user.voted_for?(investment)).to be
+      end
+
       it "does not assign vote to user multiple times" do
         user = create(:user, :level_two, document_number: "123A")
         signature = create(:signature, document_number: user.document_number)
 
-        signature.assign_vote
-        signature.assign_vote
+        signature.verify
+        signature.verify
+
+        expect(Vote.count).to eq(1)
+      end
+
+      it "does not assigns vote to invalid user on budget investment" do
+        investment = create(:budget_investment)
+        signature_sheet = create(:signature_sheet, signable: investment)
+        user = create(:user, document_number: "123A")
+        signature = create(:signature, document_number: user.document_number, signature_sheet: signature_sheet)
+
+        signature.verify
+
+        expect(user.voted_for?(investment)).to_not be
+        expect(Vote.count).to eq(0)
+      end
+
+      it "does not assign vote to user multiple times on budget investment" do
+        investment = create(:budget_investment)
+        signature_sheet = create(:signature_sheet, signable: investment)
+        user = create(:user, :level_two, document_number: "123A")
+        signature = create(:signature, document_number: user.document_number, signature_sheet: signature_sheet)
+
+        signature.verify
+        signature.verify
 
         expect(Vote.count).to eq(1)
       end
@@ -100,7 +112,22 @@ describe Signature do
         signature_sheet = create(:signature_sheet, signable: proposal)
         signature = create(:signature, signature_sheet: signature_sheet, document_number: user.document_number)
 
-        signature.assign_vote
+        signature.verify
+
+        expect(Vote.count).to eq(1)
+      end
+
+      it "does not assign vote to user if already voted on budget investment" do
+        investment = create(:budget_investment)
+        user = create(:user, :level_two, document_number: "123A")
+        vote = create(:vote, votable: investment, voter: user)
+
+        signature_sheet = create(:signature_sheet, signable: investment)
+        signature = create(:signature, document_number: user.document_number, signature_sheet: signature_sheet)
+
+        expect(Vote.count).to eq(1)
+
+        signature.verify
 
         expect(Vote.count).to eq(1)
       end
@@ -108,7 +135,7 @@ describe Signature do
       it "marks the vote as coming from a signature" do
         signature = create(:signature, document_number: "12345678Z")
 
-        signature.assign_vote
+        signature.verify
 
         expect(Vote.last.signature).to eq(signature)
       end
@@ -122,7 +149,7 @@ describe Signature do
         signature = create(:signature, document_number: "12345678Z")
         proposal = signature.signable
 
-        signature.assign_vote
+        signature.verify
 
         user = User.last
         expect(user.document_number).to eq("12345678Z")
@@ -138,7 +165,7 @@ describe Signature do
         signature = create(:signature, document_number: "12345678Z")
         proposal = signature.signable
 
-        signature.assign_vote
+        signature.verify
 
         user = signature.user
         expect(user.voted_for?(proposal)).to be
@@ -147,22 +174,18 @@ describe Signature do
       it "assigns signature to vote" do
         signature = create(:signature, document_number: "12345678Z")
 
-        signature.assign_vote
+        signature.verify
 
         expect(Vote.last.signature).to eq(signature)
       end
     end
 
-  end
-
-  describe "#verify" do
-
     describe "document in census" do
 
-      it "calls assign_vote" do
+      it "calls assign_vote_to_user" do
         signature = create(:signature, document_number: "12345678Z")
 
-        expect(signature).to receive(:assign_vote)
+        expect(signature).to receive(:assign_vote_to_user)
         signature.verify
       end
 
@@ -179,10 +202,10 @@ describe Signature do
 
     describe "document not in census" do
 
-      it "does not call assign_vote" do
+      it "does not call assign_vote_to_user" do
         signature = create(:signature, document_number: "123A")
 
-        expect(signature).to_not receive(:assign_vote)
+        expect(signature).to_not receive(:assign_vote_to_user)
         signature.verify
       end