diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 535d674fc..5ce274570 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -475,11 +475,6 @@ Style/RedundantParentheses:
     - 'spec/features/proposals_spec.rb'
     - 'spec/models/debate_spec.rb'
 
-# Offense count: 49
-# Cop supports --auto-correct.
-Style/RedundantSelf:
-  Enabled: false
-
 # Offense count: 3
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles, AllowInnerSlashes.
diff --git a/app/models/abilities/administrator.rb b/app/models/abilities/administrator.rb
index 9d779299d..2dd0d4031 100644
--- a/app/models/abilities/administrator.rb
+++ b/app/models/abilities/administrator.rb
@@ -3,7 +3,7 @@ module Abilities
     include CanCan::Ability
 
     def initialize(user)
-      self.merge Abilities::Moderation.new(user)
+      merge Abilities::Moderation.new(user)
 
       can :restore, Comment
       cannot :restore, Comment, hidden_at: nil
diff --git a/app/models/abilities/common.rb b/app/models/abilities/common.rb
index 71e839d3d..2b32abd07 100644
--- a/app/models/abilities/common.rb
+++ b/app/models/abilities/common.rb
@@ -3,7 +3,7 @@ module Abilities
     include CanCan::Ability
 
     def initialize(user)
-      self.merge Abilities::Everyone.new(user)
+      merge Abilities::Everyone.new(user)
 
       can [:read, :update], User, id: user.id
 
diff --git a/app/models/abilities/moderation.rb b/app/models/abilities/moderation.rb
index 2fa26a607..e9a1da2ac 100644
--- a/app/models/abilities/moderation.rb
+++ b/app/models/abilities/moderation.rb
@@ -3,7 +3,7 @@ module Abilities
     include CanCan::Ability
 
     def initialize(user)
-      self.merge Abilities::Common.new(user)
+      merge Abilities::Common.new(user)
 
       can :read, Organization
       can(:verify, Organization){ |o| !o.verified? }
diff --git a/app/models/abilities/moderator.rb b/app/models/abilities/moderator.rb
index ba8c659ba..479223b21 100644
--- a/app/models/abilities/moderator.rb
+++ b/app/models/abilities/moderator.rb
@@ -3,7 +3,7 @@ module Abilities
     include CanCan::Ability
 
     def initialize(user)
-      self.merge Abilities::Moderation.new(user)
+      merge Abilities::Moderation.new(user)
 
       can :comment_as_moderator, [Debate, Comment, Proposal, Budget::Investment, Poll::Question, Legislation::Question, Legislation::Annotation]
     end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 98ff4e55c..4580db880 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -7,17 +7,17 @@ class Ability
     alias_action :hide_in_moderation_screen, to: :hide
 
     if user # logged-in users
-      self.merge Abilities::Valuator.new(user) if user.valuator?
+      merge Abilities::Valuator.new(user) if user.valuator?
 
       if user.administrator?
-        self.merge Abilities::Administrator.new(user)
+        merge Abilities::Administrator.new(user)
       elsif user.moderator?
-        self.merge Abilities::Moderator.new(user)
+        merge Abilities::Moderator.new(user)
       else
-        self.merge Abilities::Common.new(user)
+        merge Abilities::Common.new(user)
       end
     else
-      self.merge Abilities::Everyone.new(user)
+      merge Abilities::Everyone.new(user)
     end
   end
 
diff --git a/app/models/budget.rb b/app/models/budget.rb
index bc7231f29..6ad8ffe61 100644
--- a/app/models/budget.rb
+++ b/app/models/budget.rb
@@ -28,7 +28,7 @@ class Budget < ActiveRecord::Base
   scope :current,   -> { where.not(phase: "finished") }
 
   def description
-    self.send("description_#{self.phase}").try(:html_safe)
+    send("description_#{phase}").try(:html_safe)
   end
 
   def self.description_max_length
@@ -134,8 +134,8 @@ class Budget < ActiveRecord::Base
     def sanitize_descriptions
       s = WYSIWYGSanitizer.new
       PHASES.each do |phase|
-        sanitized = s.sanitize(self.send("description_#{phase}"))
-        self.send("description_#{phase}=", sanitized)
+        sanitized = s.sanitize(send("description_#{phase}"))
+        send("description_#{phase}=", sanitized)
       end
     end
 end
diff --git a/app/models/budget/ballot.rb b/app/models/budget/ballot.rb
index 83e799d6f..c35222f3a 100644
--- a/app/models/budget/ballot.rb
+++ b/app/models/budget/ballot.rb
@@ -33,7 +33,7 @@ class Budget
     end
 
     def has_lines_in_group?(group)
-      self.groups.include?(group)
+      groups.include?(group)
     end
 
     def wrong_budget?(heading)
@@ -54,7 +54,7 @@ class Budget
     end
 
     def has_lines_with_heading?
-      self.heading_id.present?
+      heading_id.present?
     end
 
     def has_lines_in_heading?(heading)
@@ -62,12 +62,12 @@ class Budget
     end
 
     def has_investment?(investment)
-      self.investment_ids.include?(investment.id)
+      investment_ids.include?(investment.id)
     end
 
     def heading_for_group(group)
       return nil unless has_lines_in_group?(group)
-      self.investments.where(group: group).first.heading
+      investments.where(group: group).first.heading
     end
 
   end
diff --git a/app/models/budget/ballot/line.rb b/app/models/budget/ballot/line.rb
index e4e1d598b..2b70953f1 100644
--- a/app/models/budget/ballot/line.rb
+++ b/app/models/budget/ballot/line.rb
@@ -22,7 +22,7 @@ class Budget
       end
 
       def check_valid_heading
-        errors.add(:heading, "This heading's budget is invalid, or a heading on the same group was already selected") unless ballot.valid_heading?(self.heading)
+        errors.add(:heading, "This heading's budget is invalid, or a heading on the same group was already selected") unless ballot.valid_heading?(heading)
       end
 
       def check_selected
@@ -32,9 +32,9 @@ class Budget
       private
 
         def set_denormalized_ids
-          self.heading_id ||= self.investment.try(:heading_id)
-          self.group_id   ||= self.investment.try(:group_id)
-          self.budget_id  ||= self.investment.try(:budget_id)
+          self.heading_id ||= investment.try(:heading_id)
+          self.group_id   ||= investment.try(:group_id)
+          self.budget_id  ||= investment.try(:budget_id)
         end
     end
   end
diff --git a/app/models/budget/investment.rb b/app/models/budget/investment.rb
index 845d695bb..5fcf2e882 100644
--- a/app/models/budget/investment.rb
+++ b/app/models/budget/investment.rb
@@ -94,7 +94,7 @@ class Budget
     end
 
     def self.search(terms)
-      self.pg_search(terms)
+      pg_search(terms)
     end
 
     def self.by_heading(heading)
@@ -191,7 +191,7 @@ class Budget
     end
 
     def enough_money?(ballot)
-      available_money = ballot.amount_available(self.heading)
+      available_money = ballot.amount_available(heading)
       price.to_i <= available_money
     end
 
@@ -256,8 +256,8 @@ class Budget
     private
 
       def set_denormalized_ids
-        self.group_id = self.heading.try(:group_id) if self.heading_id_changed?
-        self.budget_id ||= self.heading.try(:group).try(:budget_id)
+        self.group_id = heading.try(:group_id) if heading_id_changed?
+        self.budget_id ||= heading.try(:group).try(:budget_id)
       end
 
   end
diff --git a/app/models/budget/reclassification.rb b/app/models/budget/reclassification.rb
index 3ce3ab146..b77dc374a 100644
--- a/app/models/budget/reclassification.rb
+++ b/app/models/budget/reclassification.rb
@@ -43,7 +43,7 @@ class Budget
     end
 
     def ballot_lines_for_investment
-      Budget::Ballot::Line.by_investment(self.id)
+      Budget::Ballot::Line.by_investment(id)
     end
 
   end
diff --git a/app/models/comment.rb b/app/models/comment.rb
index 5c7f4dd4e..44bb1f6f3 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -100,7 +100,7 @@ class Comment < ActiveRecord::Base
   end
 
   def call_after_commented
-    self.commentable.try(:after_commented)
+    commentable.try(:after_commented)
   end
 
   def self.body_max_length
diff --git a/app/models/concerns/filterable.rb b/app/models/concerns/filterable.rb
index c5402d9b2..91c6b0a96 100644
--- a/app/models/concerns/filterable.rb
+++ b/app/models/concerns/filterable.rb
@@ -9,7 +9,7 @@ module Filterable
   class_methods do
 
     def filter(params)
-      resources = self.all
+      resources = all
       params.each do |filter, value|
         if allowed_filter?(filter, value)
           resources = resources.send("by_#{filter}", value)
diff --git a/app/models/concerns/graphqlable.rb b/app/models/concerns/graphqlable.rb
index 5b88dfc59..228810579 100644
--- a/app/models/concerns/graphqlable.rb
+++ b/app/models/concerns/graphqlable.rb
@@ -4,33 +4,33 @@ module Graphqlable
   class_methods do
 
     def graphql_field_name
-      self.name.gsub('::', '_').underscore.to_sym
+      name.gsub('::', '_').underscore.to_sym
     end
 
     def graphql_field_description
-      "Find one #{self.model_name.human} by ID"
+      "Find one #{model_name.human} by ID"
     end
 
     def graphql_pluralized_field_name
-      self.name.gsub('::', '_').underscore.pluralize.to_sym
+      name.gsub('::', '_').underscore.pluralize.to_sym
     end
 
     def graphql_pluralized_field_description
-      "Find all #{self.model_name.human.pluralize}"
+      "Find all #{model_name.human.pluralize}"
     end
 
     def graphql_type_name
-      self.name.gsub('::', '_')
+      name.gsub('::', '_')
     end
 
     def graphql_type_description
-      (self.model_name.human).to_s
+      (model_name.human).to_s
     end
 
   end
 
   def public_created_at
-    self.created_at.change(min: 0)
+    created_at.change(min: 0)
   end
 
 end
diff --git a/app/models/concerns/has_public_author.rb b/app/models/concerns/has_public_author.rb
index a1af255c5..5132c33c9 100644
--- a/app/models/concerns/has_public_author.rb
+++ b/app/models/concerns/has_public_author.rb
@@ -1,5 +1,5 @@
 module HasPublicAuthor
   def public_author
-    self.author.public_activity? ? self.author : nil
+    author.public_activity? ? author : nil
   end
 end
diff --git a/app/models/concerns/measurable.rb b/app/models/concerns/measurable.rb
index 5ac2f2a14..46625435d 100644
--- a/app/models/concerns/measurable.rb
+++ b/app/models/concerns/measurable.rb
@@ -4,11 +4,11 @@ module Measurable
   class_methods do
 
     def title_max_length
-      @@title_max_length ||= (self.columns.find { |c| c.name == 'title' }.limit rescue nil) || 80
+      @@title_max_length ||= (columns.find { |c| c.name == 'title' }.limit rescue nil) || 80
     end
 
     def responsible_name_max_length
-      @@responsible_name_max_length ||= (self.columns.find { |c| c.name == 'responsible_name' }.limit rescue nil) || 60
+      @@responsible_name_max_length ||= (columns.find { |c| c.name == 'responsible_name' }.limit rescue nil) || 60
     end
 
     def question_max_length
diff --git a/app/models/concerns/sanitizable.rb b/app/models/concerns/sanitizable.rb
index a4520ba2f..055859c8b 100644
--- a/app/models/concerns/sanitizable.rb
+++ b/app/models/concerns/sanitizable.rb
@@ -17,7 +17,7 @@ module Sanitizable
     end
 
     def sanitize_tag_list
-      self.tag_list = TagSanitizer.new.sanitize_tag_list(self.tag_list) if self.class.taggable?
+      self.tag_list = TagSanitizer.new.sanitize_tag_list(tag_list) if self.class.taggable?
     end
 
 end
diff --git a/app/models/concerns/search_cache.rb b/app/models/concerns/search_cache.rb
index 9b9e62024..e3e211647 100644
--- a/app/models/concerns/search_cache.rb
+++ b/app/models/concerns/search_cache.rb
@@ -7,7 +7,7 @@ module SearchCache
 
   def calculate_tsvector
     ActiveRecord::Base.connection.execute("
-      UPDATE #{self.class.table_name} SET tsv = (#{searchable_values_sql}) WHERE id = #{self.id}")
+      UPDATE #{self.class.table_name} SET tsv = (#{searchable_values_sql}) WHERE id = #{id}")
   end
 
   private
diff --git a/app/models/concerns/searchable.rb b/app/models/concerns/searchable.rb
index 6694df114..b749377f3 100644
--- a/app/models/concerns/searchable.rb
+++ b/app/models/concerns/searchable.rb
@@ -12,7 +12,7 @@ module Searchable
       },
       ignoring: :accents,
       ranked_by: '(:tsearch)',
-      order_within_rank: (self.column_names.include?('cached_votes_up') ? "#{self.table_name}.cached_votes_up DESC" : nil)
+      order_within_rank: (column_names.include?('cached_votes_up') ? "#{table_name}.cached_votes_up DESC" : nil)
     }
   end
 
diff --git a/app/models/debate.rb b/app/models/debate.rb
index 95940b3c3..9d74597b8 100644
--- a/app/models/debate.rb
+++ b/app/models/debate.rb
@@ -55,7 +55,7 @@ class Debate < ActiveRecord::Base
   end
 
   def self.search(terms)
-    self.pg_search(terms)
+    pg_search(terms)
   end
 
   def to_param
@@ -124,15 +124,15 @@ class Debate < ActiveRecord::Base
   end
 
   def after_hide
-    self.tags.each{ |t| t.decrement_custom_counter_for('Debate') }
+    tags.each{ |t| t.decrement_custom_counter_for('Debate') }
   end
 
   def after_restore
-    self.tags.each{ |t| t.increment_custom_counter_for('Debate') }
+    tags.each{ |t| t.increment_custom_counter_for('Debate') }
   end
 
   def featured?
-    self.featured_at.present?
+    featured_at.present?
   end
 
 end
diff --git a/app/models/legislation/annotation.rb b/app/models/legislation/annotation.rb
index f2d419200..feab80902 100644
--- a/app/models/legislation/annotation.rb
+++ b/app/models/legislation/annotation.rb
@@ -45,7 +45,7 @@ class Legislation::Annotation < ActiveRecord::Base
   end
 
   def create_first_comment
-    comments.create(body: self.text, user: self.author)
+    comments.create(body: text, user: author)
   end
 
   def title
diff --git a/app/models/notification.rb b/app/models/notification.rb
index d08baecf2..84fc72f1c 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -12,7 +12,7 @@ class Notification < ActiveRecord::Base
   end
 
   def mark_as_read
-    self.destroy
+    destroy
   end
 
   def self.add(user_id, notifiable)
diff --git a/app/models/officing/residence.rb b/app/models/officing/residence.rb
index b0fc56078..6386ce0fd 100644
--- a/app/models/officing/residence.rb
+++ b/app/models/officing/residence.rb
@@ -23,12 +23,12 @@ class Officing::Residence
 
     if user_exists?
       self.user = find_user_by_document
-      self.user.update(verified_at: Time.current)
+      user.update(verified_at: Time.current)
     else
       user_params = {
         document_number:       document_number,
         document_type:         document_type,
-        geozone:               self.geozone,
+        geozone:               geozone,
         date_of_birth:         date_of_birth.to_datetime,
         gender:                gender,
         residence_verified_at: Time.current,
@@ -115,7 +115,7 @@ class Officing::Residence
     end
 
     def clean_document_number
-      self.document_number = self.document_number.gsub(/[^a-z0-9]+/i, "").upcase if self.document_number.present?
+      self.document_number = document_number.gsub(/[^a-z0-9]+/i, "").upcase if document_number.present?
     end
 
     def random_password
diff --git a/app/models/organization.rb b/app/models/organization.rb
index f3f8956d5..37b46df55 100644
--- a/app/models/organization.rb
+++ b/app/models/organization.rb
@@ -39,11 +39,11 @@ class Organization < ActiveRecord::Base
   end
 
   def self.name_max_length
-    @@name_max_length ||= self.columns.find { |c| c.name == 'name' }.limit || 60
+    @@name_max_length ||= columns.find { |c| c.name == 'name' }.limit || 60
   end
 
   def self.responsible_name_max_length
-    @@responsible_name_max_length ||= self.columns.find { |c| c.name == 'responsible_name' }.limit || 60
+    @@responsible_name_max_length ||= columns.find { |c| c.name == 'responsible_name' }.limit || 60
   end
 
   private
diff --git a/app/models/poll/final_recount.rb b/app/models/poll/final_recount.rb
index 6ebf5eede..3647c85ca 100644
--- a/app/models/poll/final_recount.rb
+++ b/app/models/poll/final_recount.rb
@@ -10,9 +10,9 @@ class Poll
     before_save :update_logs
 
     def update_logs
-      if self.count_changed? && self.count_was.present?
-        self.count_log += ":#{self.count_was.to_s}"
-        self.officer_assignment_id_log += ":#{self.officer_assignment_id_was.to_s}"
+      if count_changed? && count_was.present?
+        self.count_log += ":#{count_was.to_s}"
+        self.officer_assignment_id_log += ":#{officer_assignment_id_was.to_s}"
       end
     end
   end
diff --git a/app/models/poll/null_result.rb b/app/models/poll/null_result.rb
index bdd708504..d10fe3cb0 100644
--- a/app/models/poll/null_result.rb
+++ b/app/models/poll/null_result.rb
@@ -14,10 +14,10 @@ class Poll::NullResult < ActiveRecord::Base
   before_save :update_logs
 
   def update_logs
-    if self.amount_changed? && self.amount_was.present?
-      self.amount_log += ":#{self.amount_was.to_s}"
-      self.officer_assignment_id_log += ":#{self.officer_assignment_id_was.to_s}"
-      self.author_id_log += ":#{self.author_id_was.to_s}"
+    if amount_changed? && amount_was.present?
+      self.amount_log += ":#{amount_was.to_s}"
+      self.officer_assignment_id_log += ":#{officer_assignment_id_was.to_s}"
+      self.author_id_log += ":#{author_id_was.to_s}"
     end
   end
 end
diff --git a/app/models/poll/partial_result.rb b/app/models/poll/partial_result.rb
index dbc0d6bae..12b16aa3a 100644
--- a/app/models/poll/partial_result.rb
+++ b/app/models/poll/partial_result.rb
@@ -19,10 +19,10 @@ class Poll::PartialResult < ActiveRecord::Base
   before_save :update_logs
 
   def update_logs
-    if self.amount_changed? && self.amount_was.present?
-      self.amount_log += ":#{self.amount_was.to_s}"
-      self.officer_assignment_id_log += ":#{self.officer_assignment_id_was.to_s}"
-      self.author_id_log += ":#{self.author_id_was.to_s}"
+    if amount_changed? && amount_was.present?
+      self.amount_log += ":#{amount_was.to_s}"
+      self.officer_assignment_id_log += ":#{officer_assignment_id_was.to_s}"
+      self.author_id_log += ":#{author_id_was.to_s}"
     end
   end
 end
diff --git a/app/models/poll/question.rb b/app/models/poll/question.rb
index a1d949d42..b67650a8d 100644
--- a/app/models/poll/question.rb
+++ b/app/models/poll/question.rb
@@ -25,7 +25,7 @@ class Poll::Question < ActiveRecord::Base
   scope :for_render,    -> { includes(:author, :proposal) }
 
   def self.search(params)
-    results = self.all
+    results = all
     results = results.by_poll_id(params[:poll_id]) if params[:poll_id].present?
     results = results.pg_search(params[:search])   if params[:search].present?
     results
diff --git a/app/models/poll/recount.rb b/app/models/poll/recount.rb
index b4e28583e..57ced61fb 100644
--- a/app/models/poll/recount.rb
+++ b/app/models/poll/recount.rb
@@ -11,9 +11,9 @@ class Poll
     before_save :update_logs
 
     def update_logs
-      if self.count_changed? && self.count_was.present?
-        self.count_log += ":#{self.count_was.to_s}"
-        self.officer_assignment_id_log += ":#{self.officer_assignment_id_was.to_s}"
+      if count_changed? && count_was.present?
+        self.count_log += ":#{count_was.to_s}"
+        self.officer_assignment_id_log += ":#{officer_assignment_id_was.to_s}"
       end
     end
   end
diff --git a/app/models/poll/white_result.rb b/app/models/poll/white_result.rb
index 3f41795b3..a4a4e5a4d 100644
--- a/app/models/poll/white_result.rb
+++ b/app/models/poll/white_result.rb
@@ -14,10 +14,10 @@ class Poll::WhiteResult < ActiveRecord::Base
   before_save :update_logs
 
   def update_logs
-    if self.amount_changed? && self.amount_was.present?
-      self.amount_log += ":#{self.amount_was.to_s}"
-      self.officer_assignment_id_log += ":#{self.officer_assignment_id_was.to_s}"
-      self.author_id_log += ":#{self.author_id_was.to_s}"
+    if amount_changed? && amount_was.present?
+      self.amount_log += ":#{amount_was.to_s}"
+      self.officer_assignment_id_log += ":#{officer_assignment_id_was.to_s}"
+      self.author_id_log += ":#{author_id_was.to_s}"
     end
   end
 end
diff --git a/app/models/proposal.rb b/app/models/proposal.rb
index 8c7e2065a..9e02c197e 100644
--- a/app/models/proposal.rb
+++ b/app/models/proposal.rb
@@ -71,12 +71,12 @@ class Proposal < ActiveRecord::Base
   end
 
   def self.search(terms)
-    by_code = self.search_by_code(terms.strip)
-    by_code.present? ? by_code : self.pg_search(terms)
+    by_code = search_by_code(terms.strip)
+    by_code.present? ? by_code : pg_search(terms)
   end
 
   def self.search_by_code(terms)
-    matched_code = self.match_code(terms)
+    matched_code = match_code(terms)
     results = where(id: matched_code[1]) if matched_code
     return results if (results.present? && results.first.code == terms)
   end
@@ -147,11 +147,11 @@ class Proposal < ActiveRecord::Base
   end
 
   def after_hide
-    self.tags.each{ |t| t.decrement_custom_counter_for('Proposal') }
+    tags.each{ |t| t.decrement_custom_counter_for('Proposal') }
   end
 
   def after_restore
-    self.tags.each{ |t| t.increment_custom_counter_for('Proposal') }
+    tags.each{ |t| t.increment_custom_counter_for('Proposal') }
   end
 
   def self.votes_needed_for_success
@@ -163,7 +163,7 @@ class Proposal < ActiveRecord::Base
   end
 
   def archived?
-    self.created_at <= Setting["months_to_archive_proposals"].to_i.months.ago
+    created_at <= Setting["months_to_archive_proposals"].to_i.months.ago
   end
 
   def notifications
diff --git a/app/models/signature.rb b/app/models/signature.rb
index 543965aed..88b875894 100644
--- a/app/models/signature.rb
+++ b/app/models/signature.rb
@@ -59,8 +59,8 @@ class Signature < ActiveRecord::Base
   end
 
   def clean_document_number
-    return if self.document_number.blank?
-    self.document_number = self.document_number.gsub(/[^a-z0-9]+/i, "").upcase
+    return if document_number.blank?
+    self.document_number = document_number.gsub(/[^a-z0-9]+/i, "").upcase
   end
 
   def random_password
diff --git a/app/models/signature_sheet.rb b/app/models/signature_sheet.rb
index 3b2f8333d..3e46c1cd1 100644
--- a/app/models/signature_sheet.rb
+++ b/app/models/signature_sheet.rb
@@ -22,7 +22,7 @@ class SignatureSheet < ActiveRecord::Base
 
   def verify_signatures
     parsed_document_numbers.each do |document_number|
-      signature = self.signatures.where(document_number: document_number).first_or_create
+      signature = signatures.where(document_number: document_number).first_or_create
       signature.verify
     end
     update(processed: true)
diff --git a/app/models/spending_proposal.rb b/app/models/spending_proposal.rb
index 8026a3b9f..f6f367f62 100644
--- a/app/models/spending_proposal.rb
+++ b/app/models/spending_proposal.rb
@@ -66,7 +66,7 @@ class SpendingProposal < ActiveRecord::Base
   end
 
   def self.search(terms)
-    self.pg_search(terms)
+    pg_search(terms)
   end
 
   def self.by_geozone(geozone)
diff --git a/app/models/user.rb b/app/models/user.rb
index 9df08c014..b41057157 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -169,7 +169,7 @@ class User < ActiveRecord::Base
     comments_ids = Comment.where(user_id: id).pluck(:id)
     proposal_ids = Proposal.where(author_id: id).pluck(:id)
 
-    self.hide
+    hide
 
     Debate.hide_all debates_ids
     Comment.hide_all comments_ids
@@ -177,7 +177,7 @@ class User < ActiveRecord::Base
   end
 
   def erase(erase_reason = nil)
-    self.update(
+    update(
       erased_at: Time.current,
       erase_reason: erase_reason,
       username: nil,
@@ -191,7 +191,7 @@ class User < ActiveRecord::Base
       confirmed_phone: nil,
       unconfirmed_phone: nil
     )
-    self.identities.destroy_all
+    identities.destroy_all
   end
 
   def erased?
@@ -201,17 +201,17 @@ class User < ActiveRecord::Base
   def take_votes_if_erased_document(document_number, document_type)
     erased_user = User.erased.where(document_number: document_number).where(document_type: document_type).first
     if erased_user.present?
-      self.take_votes_from(erased_user)
+      take_votes_from(erased_user)
       erased_user.update(document_number: nil, document_type: nil)
     end
   end
 
   def take_votes_from(other_user)
     return if other_user.blank?
-    Poll::Voter.where(user_id: other_user.id).update_all(user_id: self.id)
-    Budget::Ballot.where(user_id: other_user.id).update_all(user_id: self.id)
-    Vote.where("voter_id = ? AND voter_type = ?", other_user.id, "User").update_all(voter_id: self.id)
-    self.update(former_users_data_log: "#{self.former_users_data_log} | id: #{other_user.id} - #{Time.current.strftime('%Y-%m-%d %H:%M:%S')}")
+    Poll::Voter.where(user_id: other_user.id).update_all(user_id: id)
+    Budget::Ballot.where(user_id: other_user.id).update_all(user_id: id)
+    Vote.where("voter_id = ? AND voter_type = ?", other_user.id, "User").update_all(voter_id: id)
+    update(former_users_data_log: "#{former_users_data_log} | id: #{other_user.id} - #{Time.current.strftime('%Y-%m-%d %H:%M:%S')}")
   end
 
   def locked?
@@ -223,7 +223,7 @@ class User < ActiveRecord::Base
   end
 
   def self.username_max_length
-    @@username_max_length ||= self.columns.find { |c| c.name == 'username' }.limit || 60
+    @@username_max_length ||= columns.find { |c| c.name == 'username' }.limit || 60
   end
 
   def self.minimum_required_age
@@ -257,10 +257,10 @@ class User < ActiveRecord::Base
 
   def send_oauth_confirmation_instructions
     if oauth_email != email
-      self.update(confirmed_at: nil)
-      self.send_confirmation_instructions
+      update(confirmed_at: nil)
+      send_confirmation_instructions
     end
-    self.update(oauth_email: nil) if oauth_email.present?
+    update(oauth_email: nil) if oauth_email.present?
   end
 
   def name_and_email
@@ -274,11 +274,11 @@ class User < ActiveRecord::Base
   def save_requiring_finish_signup
     begin
       self.registering_with_oauth = true
-      self.save(validate: false)
+      save(validate: false)
     # Devise puts unique constraints for the email the db, so we must detect & handle that
     rescue ActiveRecord::RecordNotUnique
       self.email = nil
-      self.save(validate: false)
+      save(validate: false)
     end
     true
   end
@@ -311,7 +311,7 @@ class User < ActiveRecord::Base
   private
 
     def clean_document_number
-      self.document_number = self.document_number.gsub(/[^a-z0-9]+/i, "").upcase if self.document_number.present?
+      self.document_number = document_number.gsub(/[^a-z0-9]+/i, "").upcase if document_number.present?
     end
 
     def validate_username_length
diff --git a/app/models/verification/email.rb b/app/models/verification/email.rb
index 7e177bd10..95faecad3 100644
--- a/app/models/verification/email.rb
+++ b/app/models/verification/email.rb
@@ -27,7 +27,7 @@ class Verification::Email
   end
 
   def self.find(user, token)
-    self.valid_token?(user, token)
+    valid_token?(user, token)
   end
 
   def self.valid_token?(user, token)
diff --git a/app/models/verification/residence.rb b/app/models/verification/residence.rb
index 7fa7f74b4..c14bba85d 100644
--- a/app/models/verification/residence.rb
+++ b/app/models/verification/residence.rb
@@ -31,7 +31,7 @@ class Verification::Residence
 
     user.update(document_number:       document_number,
                 document_type:         document_type,
-                geozone:               self.geozone,
+                geozone:               geozone,
                 date_of_birth:         date_of_birth.to_datetime,
                 gender:                gender,
                 residence_verified_at: Time.current)
@@ -39,7 +39,7 @@ class Verification::Residence
 
   def allowed_age
     return if errors[:date_of_birth].any?
-    errors.add(:date_of_birth, I18n.t('verification.residence.new.error_not_allowed_age')) unless Age.in_years(self.date_of_birth) >= User.minimum_required_age
+    errors.add(:date_of_birth, I18n.t('verification.residence.new.error_not_allowed_age')) unless Age.in_years(date_of_birth) >= User.minimum_required_age
   end
 
   def document_number_uniqueness
@@ -81,7 +81,7 @@ class Verification::Residence
     end
 
     def clean_document_number
-      self.document_number = self.document_number.gsub(/[^a-z0-9]+/i, "").upcase if self.document_number.present?
+      self.document_number = document_number.gsub(/[^a-z0-9]+/i, "").upcase if document_number.present?
     end
 
 end
diff --git a/app/models/verification/sms.rb b/app/models/verification/sms.rb
index 7c1a1bfa6..830204009 100644
--- a/app/models/verification/sms.rb
+++ b/app/models/verification/sms.rb
@@ -12,7 +12,7 @@ class Verification::Sms
   end
 
   def save
-    return false unless self.valid?
+    return false unless valid?
     update_user_phone_information
     send_sms
     Lock.increase_tries(user)
diff --git a/lib/acts_as_paranoid_aliases.rb b/lib/acts_as_paranoid_aliases.rb
index 17587fca8..c95acee0d 100644
--- a/lib/acts_as_paranoid_aliases.rb
+++ b/lib/acts_as_paranoid_aliases.rb
@@ -2,7 +2,7 @@ module ActsAsParanoidAliases
 
   def self.included(base)
     base.extend(ClassMethods)
-    self.class_eval do
+    class_eval do
 
       def hide
         return false if hidden?
diff --git a/lib/numeric.rb b/lib/numeric.rb
index c741715dd..9ed1aabae 100644
--- a/lib/numeric.rb
+++ b/lib/numeric.rb
@@ -1,5 +1,5 @@
 class Numeric
   def percent_of(n)
-    (self.to_f / n * 100).to_i
+    (to_f / n * 100).to_i
   end
 end
\ No newline at end of file