diff --git a/Gemfile b/Gemfile
index 42a9cc09..f311f384 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,6 @@ gem 'haml-rails'
 gem 'kaminari'
 gem 'client_side_validations'
 gem 'simple_form'
-gem 'rails3_acts_as_paranoid', "~>0.2.0"
 gem 'inherited_resources'
 gem 'localize_input', :git => "git://github.com/bennibu/localize_input.git"
 gem 'wikicloth'
diff --git a/Gemfile.lock b/Gemfile.lock
index b44f286d..aabdad24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,8 +143,6 @@ GEM
       activesupport (= 3.2.11)
       bundler (~> 1.0)
       railties (= 3.2.11)
-    rails3_acts_as_paranoid (0.2.4)
-      activerecord (~> 3.2)
     railties (3.2.11)
       actionpack (= 3.2.11)
       activesupport (= 3.2.11)
@@ -240,7 +238,6 @@ DEPENDENCIES
   mysql2
   prawn
   rails (~> 3.2.9)
-  rails3_acts_as_paranoid (~> 0.2.0)
   resque
   ruby-prof
   sass-rails (~> 3.2.3)
diff --git a/app/controllers/admin/ordergroups_controller.rb b/app/controllers/admin/ordergroups_controller.rb
index 828d91a6..c019ee55 100644
--- a/app/controllers/admin/ordergroups_controller.rb
+++ b/app/controllers/admin/ordergroups_controller.rb
@@ -3,7 +3,7 @@ class Admin::OrdergroupsController < Admin::BaseController
   inherit_resources
   
   def index
-    @ordergroups = Ordergroup.order('name ASC')
+    @ordergroups = Ordergroup.undeleted.order('name ASC')
 
     # if somebody uses the search field:
     unless params[:query].blank?
@@ -15,7 +15,7 @@ class Admin::OrdergroupsController < Admin::BaseController
 
   def destroy
     @ordergroup = Ordergroup.find(params[:id])
-    @ordergroup.destroy
+    @ordergroup.mark_as_deleted
     redirect_to admin_ordergroups_url, :notice => "Bestellgruppe wurde gelöscht"
   rescue => error
     redirect_to admin_ordergroups_url, :alert => "Bestellgruppe konnte nicht gelöscht werden: #{error}"
diff --git a/app/controllers/articles_controller.rb b/app/controllers/articles_controller.rb
index 35bd36db..a9af168e 100644
--- a/app/controllers/articles_controller.rb
+++ b/app/controllers/articles_controller.rb
@@ -20,7 +20,7 @@ class ArticlesController < ApplicationController
       sort = "article_categories.name, articles.name"
     end
 
-    @articles = Article.where(supplier_id: @supplier, :type => nil).includes(:article_category).order(sort)
+    @articles = Article.undeleted.where(supplier_id: @supplier, :type => nil).includes(:article_category).order(sort)
     @articles = @articles.where('articles.name LIKE ?', "%#{params[:query]}%") unless params[:query].nil?
 
     @articles = @articles.page(params[:page]).per(@per_page)
@@ -64,13 +64,13 @@ class ArticlesController < ApplicationController
   # Deletes article from database. send error msg, if article is used in a current order
   def destroy
     @article = Article.find(params[:id])
-    @article.destroy unless @order = @article.in_open_order # If article is in an active Order, the Order will be returned
+    @article.mark_as_deleted unless @order = @article.in_open_order # If article is in an active Order, the Order will be returned
     render :layout => false
   end   
   
   # Renders a form for editing all articles from a supplier
   def edit_all
-    @articles = @supplier.articles
+    @articles = @supplier.articles.undeleted
   end
 
   # Updates all article of specific supplier
@@ -114,23 +114,24 @@ class ArticlesController < ApplicationController
   def update_selected
     raise 'Du hast keine Artikel ausgewählt' if params[:selected_articles].nil?
     articles = Article.find(params[:selected_articles])
-
-    case params[:selected_action]
-    when 'destroy'
-      articles.each {|a| a.destroy }
-      flash[:notice] = 'Alle gewählten Artikel wurden gelöscht'
-    when 'setNotAvailable'
-      articles.each {|a| a.update_attribute(:availability, false) }
-      flash[:notice] = 'Alle gewählten Artikel wurden auf "nicht verfügbar" gesetzt'
-    when 'setAvailable'
-      articles.each {|a| a.update_attribute(:availability, true) }
-      flash[:notice] = 'Alle gewählten Artikel wurden auf "verfügbar" gesetzt'
-    else
-      flash[:alert] = 'Keine Aktion ausgewählt!'
+    Article.transaction do
+      case params[:selected_action]
+        when 'destroy'
+          articles.each(&:mark_as_deleted)
+          flash[:notice] = 'Alle gewählten Artikel wurden gelöscht'
+        when 'setNotAvailable'
+          articles.each {|a| a.update_attribute(:availability, false) }
+          flash[:notice] = 'Alle gewählten Artikel wurden auf "nicht verfügbar" gesetzt'
+        when 'setAvailable'
+          articles.each {|a| a.update_attribute(:availability, true) }
+          flash[:notice] = 'Alle gewählten Artikel wurden auf "verfügbar" gesetzt'
+        else
+          flash[:alert] = 'Keine Aktion ausgewählt!'
+      end
     end
     # action succeded
     redirect_to supplier_articles_url(@supplier, :per_page => params[:per_page])
-      
+
   rescue => error
     redirect_to supplier_articles_url(@supplier, :per_page => params[:per_page]),
                 :alert => "Ein Fehler ist aufgetreten: #{error}"
diff --git a/app/controllers/finance/ordergroups_controller.rb b/app/controllers/finance/ordergroups_controller.rb
index 3b618e37..d4daeff6 100644
--- a/app/controllers/finance/ordergroups_controller.rb
+++ b/app/controllers/finance/ordergroups_controller.rb
@@ -12,7 +12,7 @@ class Finance::OrdergroupsController < Finance::BaseController
       sort = "name"
     end
 
-    @ordergroups = Ordergroup.order(sort)
+    @ordergroups = Ordergroup.undeleted.order(sort)
     @ordergroups = @ordergroups.where('name LIKE ?', "%#{params[:query]}%") unless params[:query].nil?
 
     @ordergroups = @ordergroups.page(params[:page]).per(@per_page)
diff --git a/app/controllers/foodcoop/ordergroups_controller.rb b/app/controllers/foodcoop/ordergroups_controller.rb
index 0975b9a5..5391b798 100644
--- a/app/controllers/foodcoop/ordergroups_controller.rb
+++ b/app/controllers/foodcoop/ordergroups_controller.rb
@@ -1,7 +1,7 @@
 class Foodcoop::OrdergroupsController < ApplicationController
   
   def index
-    @ordergroups = Ordergroup.order('name DESC')
+    @ordergroups = Ordergroup.undeleted.order('name DESC')
 
     unless params[:name].blank? # Search by name
       @ordergroups = @ordergroups.where('name LIKE ?', "%#{params[:name]}%")
diff --git a/app/controllers/stockit_controller.rb b/app/controllers/stockit_controller.rb
index 2a232a31..03befe63 100644
--- a/app/controllers/stockit_controller.rb
+++ b/app/controllers/stockit_controller.rb
@@ -1,7 +1,7 @@
 class StockitController < ApplicationController
 
   def index
-    @stock_articles = StockArticle.includes(:supplier, :article_category).
+    @stock_articles = StockArticle.undeleted.includes(:supplier, :article_category).
         order('suppliers.name, article_categories.name, articles.name')
   end
 
@@ -33,7 +33,7 @@ class StockitController < ApplicationController
 
   def destroy
     @article = StockArticle.find(params[:id])
-    @article.destroy
+    @article.mark_as_deleted
     render :layout => false
   rescue => error
     render :partial => "destroy_fail", :layout => false,
diff --git a/app/controllers/suppliers_controller.rb b/app/controllers/suppliers_controller.rb
index 5851c714..5a14e184 100644
--- a/app/controllers/suppliers_controller.rb
+++ b/app/controllers/suppliers_controller.rb
@@ -4,7 +4,7 @@ class SuppliersController < ApplicationController
   helper :deliveries
 
   def index
-    @suppliers = Supplier.order(:name)
+    @suppliers = Supplier.undeleted.order(:name)
     @deliveries = Delivery.recent
   end
 
@@ -50,7 +50,7 @@ class SuppliersController < ApplicationController
 
   def destroy
     @supplier = Supplier.find(params[:id])
-    @supplier.destroy
+    @supplier.mark_as_deleted
     flash[:notice] = "Lieferant wurde gelöscht"
     redirect_to suppliers_path
     rescue => e
diff --git a/app/models/article.rb b/app/models/article.rb
index 32554e84..852bed32 100644
--- a/app/models/article.rb
+++ b/app/models/article.rb
@@ -1,16 +1,16 @@
 # encoding: utf-8
 class Article < ActiveRecord::Base
-  acts_as_paranoid  # Avoid deleting the article for consistency of order-results
   extend ActiveSupport::Memoizable    # Ability to cache method results. Use memoize :expensive_method
 
   # Replace numeric seperator with database format
   localize_input_of :price, :tax, :deposit
 
   # Associations
-  belongs_to :supplier, :with_deleted => true
+  belongs_to :supplier
   belongs_to :article_category
   has_many :article_prices, :order => "created_at DESC"
 
+  scope :undeleted, -> { where(deleted_at: nil) }
   scope :available, :conditions => {:availability => true}
   scope :not_in_stock, :conditions => {:type => nil}
 
@@ -136,6 +136,15 @@ class Article < ActiveRecord::Base
     end
   end
 
+  def deleted?
+    deleted_at.present?
+  end
+
+  def mark_as_deleted
+    check_article_in_use
+    update_column :deleted_at, Time.now
+  end
+
   protected
   
   # Checks if the article is in use before it will deleted
diff --git a/app/models/article_price.rb b/app/models/article_price.rb
index 686b891c..e946fc92 100644
--- a/app/models/article_price.rb
+++ b/app/models/article_price.rb
@@ -1,6 +1,6 @@
 class ArticlePrice < ActiveRecord::Base
 
-  belongs_to :article, :with_deleted => true
+  belongs_to :article
   has_many :order_articles
 
   validates_presence_of :price, :tax, :deposit, :unit_quantity
diff --git a/app/models/delivery.rb b/app/models/delivery.rb
index b9c04616..3add6fdf 100644
--- a/app/models/delivery.rb
+++ b/app/models/delivery.rb
@@ -1,6 +1,6 @@
 class Delivery < ActiveRecord::Base
 
-  belongs_to :supplier, :with_deleted => true
+  belongs_to :supplier
   has_one :invoice
   has_many :stock_changes, :dependent => :destroy
 
diff --git a/app/models/financial_transaction.rb b/app/models/financial_transaction.rb
index bdd7e48a..354a3d2a 100644
--- a/app/models/financial_transaction.rb
+++ b/app/models/financial_transaction.rb
@@ -1,7 +1,7 @@
 # financial transactions are the foodcoop internal financial transactions
 # only ordergroups have an account  balance and are happy to transfer money
 class FinancialTransaction < ActiveRecord::Base
-  belongs_to :ordergroup, :with_deleted => true
+  belongs_to :ordergroup
   belongs_to :user
   
   validates_presence_of :amount, :note, :user_id, :ordergroup_id
diff --git a/app/models/group.rb b/app/models/group.rb
index 68cb015c..092c0119 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -1,13 +1,15 @@
 # Groups organize the User. 
 # A Member gets the roles from the Group
 class Group < ActiveRecord::Base
-  has_many :memberships, :dependent => :destroy
+  has_many :memberships
   has_many :users, :through => :memberships
 
   validates :name, :presence => true, :length => {:in => 1..25}
   
   attr_reader :user_tokens
-  
+
+  scope :undeleted, -> { where(deleted_at: nil) }
+
   # Returns true if the given user if is an member of this group.
   def member?(user)
     memberships.find_by_user_id(user.id)
@@ -21,7 +23,19 @@ class Group < ActiveRecord::Base
   def user_tokens=(ids)
     self.user_ids = ids.split(",")
   end
-  
+
+  def deleted?
+    deleted_at.present?
+  end
+
+  def mark_as_deleted
+    # TODO: Checks for participating in not closed orders
+    transaction do
+      memberships.destroy_all
+      # TODO: What should happen to users?
+      update_column :deleted_at, Time.now
+    end
+  end
 end
 
 
diff --git a/app/models/group_order.rb b/app/models/group_order.rb
index 04e69de7..35bec437 100644
--- a/app/models/group_order.rb
+++ b/app/models/group_order.rb
@@ -4,7 +4,7 @@ class GroupOrder < ActiveRecord::Base
   attr_accessor :group_order_articles_attributes
 
   belongs_to :order
-  belongs_to :ordergroup, :with_deleted => true
+  belongs_to :ordergroup
   has_many :group_order_articles, :dependent => :destroy
   has_many :order_articles, :through => :group_order_articles
   belongs_to :updated_by, :class_name => "User", :foreign_key => "updated_by_user_id"
diff --git a/app/models/invoice.rb b/app/models/invoice.rb
index a9f1d9ca..0feb3ede 100644
--- a/app/models/invoice.rb
+++ b/app/models/invoice.rb
@@ -1,6 +1,6 @@
 class Invoice < ActiveRecord::Base
 
-  belongs_to :supplier, :with_deleted => true
+  belongs_to :supplier
   belongs_to :delivery
   belongs_to :order
 
diff --git a/app/models/order.rb b/app/models/order.rb
index 5afc166a..480df14a 100644
--- a/app/models/order.rb
+++ b/app/models/order.rb
@@ -10,7 +10,7 @@ class Order < ActiveRecord::Base
   has_one :invoice
   has_many :comments, :class_name => "OrderComment", :order => "created_at"
   has_many :stock_changes
-  belongs_to :supplier, :with_deleted => true
+  belongs_to :supplier
   belongs_to :updated_by, :class_name => 'User', :foreign_key => 'updated_by_user_id'
   belongs_to :created_by, :class_name => 'User', :foreign_key => 'created_by_user_id'
 
diff --git a/app/models/order_article.rb b/app/models/order_article.rb
index b68bfe82..af257f5d 100644
--- a/app/models/order_article.rb
+++ b/app/models/order_article.rb
@@ -4,7 +4,7 @@ class OrderArticle < ActiveRecord::Base
   attr_reader :update_current_price
 
   belongs_to :order
-  belongs_to :article, :with_deleted => true
+  belongs_to :article
   belongs_to :article_price
   has_many :group_order_articles, :dependent => :destroy
 
diff --git a/app/models/ordergroup.rb b/app/models/ordergroup.rb
index dbfe3171..ad1cffde 100644
--- a/app/models/ordergroup.rb
+++ b/app/models/ordergroup.rb
@@ -8,7 +8,6 @@ class Ordergroup < Group
 
   APPLE_MONTH_AGO = 6                 # How many month back we will count tasks and orders sum
 
-  acts_as_paranoid                    # Avoid deleting the ordergroup for consistency of order-results
   serialize :stats
 
   has_many :financial_transactions
@@ -110,7 +109,7 @@ class Ordergroup < Group
   # Make sure, the name is uniq, add usefull message if uniq group is already deleted
   def uniqueness_of_name
     id = new_record? ? '' : self.id
-    group = Ordergroup.with_deleted.where('groups.id != ? AND groups.name = ?', id, name).first
+    group = Ordergroup.where('groups.id != ? AND groups.name = ?', id, name).first
     if group.present?
       message = group.deleted? ? :taken_with_deleted : :taken
       errors.add :name, message
diff --git a/app/models/stock_article.rb b/app/models/stock_article.rb
index 6050c8c4..21c8bb56 100644
--- a/app/models/stock_article.rb
+++ b/app/models/stock_article.rb
@@ -1,10 +1,9 @@
 # encoding: utf-8
 class StockArticle < Article
-  acts_as_paranoid
-  
+
   has_many :stock_changes
 
-  scope :available, :conditions => "quantity > 0"
+  scope :available, -> { undeleted.where'quantity > 0' }
 
   before_destroy :check_quantity
 
@@ -23,6 +22,11 @@ class StockArticle < Article
     available.collect { |a| a.quantity * a.gross_price }.sum
   end
 
+  def mark_as_deleted
+    check_quantity
+    super
+  end
+
   protected
 
   def check_quantity
diff --git a/app/models/stock_change.rb b/app/models/stock_change.rb
index 029b92b6..6a7adc75 100644
--- a/app/models/stock_change.rb
+++ b/app/models/stock_change.rb
@@ -1,7 +1,7 @@
 class StockChange < ActiveRecord::Base
   belongs_to :delivery
   belongs_to :order
-  belongs_to :stock_article, with_deleted: true
+  belongs_to :stock_article
 
   validates_presence_of :stock_article_id, :quantity
   validates_numericality_of :quantity
diff --git a/app/models/supplier.rb b/app/models/supplier.rb
index 384c5973..557cd4e4 100644
--- a/app/models/supplier.rb
+++ b/app/models/supplier.rb
@@ -1,7 +1,7 @@
+# encoding: utf-8
 class Supplier < ActiveRecord::Base
-  acts_as_paranoid  # Avoid deleting the supplier for consistency of order-results
 
-  has_many :articles, :dependent => :destroy, :conditions => {:type => nil},
+  has_many :articles, :conditions => {:type => nil},
     :include => [:article_category], :order => 'article_categories.name, articles.name'
   has_many :stock_articles, :include => [:article_category], :order => 'article_categories.name, articles.name'
   has_many :orders
@@ -20,13 +20,15 @@ class Supplier < ActiveRecord::Base
   validates_length_of :address, :in => 8..50
   validate :uniqueness_of_name
 
+  scope :undeleted, -> { where(deleted_at: nil) }
+
   # sync all articles with the external database
   # returns an array with articles(and prices), which should be updated (to use in a form)
   # also returns an array with outlisted_articles, which should be deleted
   def sync_all
     updated_articles = Array.new
     outlisted_articles = Array.new
-    for article in articles
+    for article in articles.undeleted
       # try to find the associated shared_article
       shared_article = article.shared_article
 
@@ -65,12 +67,23 @@ class Supplier < ActiveRecord::Base
     return [updated_articles, outlisted_articles]
   end
 
+  def deleted?
+    deleted_at.present?
+  end
+
+  def mark_as_deleted
+    transaction do
+      update_column :deleted_at, Time.now
+      articles.each(&:mark_as_deleted)
+    end
+  end
+
   protected
 
   # Make sure, the name is uniq, add usefull message if uniq group is already deleted
   def uniqueness_of_name
     id = new_record? ? '' : self.id
-    supplier = Supplier.with_deleted.where('suppliers.id != ? AND suppliers.name = ?', id, name).first
+    supplier = Supplier.where('suppliers.id != ? AND suppliers.name = ?', id, name).first
     if supplier.present?
       message = supplier.deleted? ? :taken_with_deleted : :taken
       errors.add :name, message
diff --git a/app/views/articles/index.haml b/app/views/articles/index.haml
index be976bd5..5c8946ee 100644
--- a/app/views/articles/index.haml
+++ b/app/views/articles/index.haml
@@ -1,4 +1,4 @@
-- title "Artikel von #{@supplier.name} (#{@supplier.articles.count})"
+- title "Artikel von #{@supplier.name} (#{@supplier.articles.undeleted.count})"
 
 .well.well-small
   .btn-toolbar
@@ -28,7 +28,7 @@
         Lieferant wechseln ..
         %span.caret
       %ul.dropdown-menu
-        - Supplier.where('id != ?', @supplier.id).order('name ASC').each do |supplier|
+        - Supplier.undeleted.where('id != ?', @supplier.id).order('suppliers.name ASC').each do |supplier|
           %li= link_to supplier.name, supplier_articles_path(supplier), tabindex: -1
 
 - unless @supplier.shared_supplier.nil?
diff --git a/app/views/messages/new.haml b/app/views/messages/new.haml
index 965bf7a5..36f70970 100644
--- a/app/views/messages/new.haml
+++ b/app/views/messages/new.haml
@@ -41,7 +41,7 @@
 
   #recipients
     = f.input :recipient_tokens, :input_html => { 'data-pre' => User.find_all_by_id(@message.recipients_ids).map { |u| u.token_attributes }.to_json }
-    = f.input :group_id, :as => :select, :collection => Group.order('type DESC, name ASC').all.reject { |g| g.memberships.empty? }
+    = f.input :group_id, :as => :select, :collection => Group.undeleted.order('type DESC, name ASC').all.reject { |g| g.memberships.empty? }
   = f.input :private
   = f.input :subject, input_html: {class: 'input-xxlarge'}
   = f.input :body, input_html: {class: 'input-xxlarge'}
diff --git a/app/views/orders/index.html.haml b/app/views/orders/index.html.haml
index 1ebe04f0..4180c96d 100644
--- a/app/views/orders/index.html.haml
+++ b/app/views/orders/index.html.haml
@@ -6,7 +6,7 @@
       Neue Bestellung anlegen
       %span.caret
     %ul.dropdown-menu
-      - Supplier.all.each do |supplier|
+      - Supplier.undeleted.order('suppliers.name ASC').each do |supplier|
         %li= link_to supplier.name, new_order_path(supplier_id: supplier.id), tabindex: -1
 
 .well
diff --git a/app/views/suppliers/index.haml b/app/views/suppliers/index.haml
index 4697f573..bb9a3e0f 100644
--- a/app/views/suppliers/index.haml
+++ b/app/views/suppliers/index.haml
@@ -18,8 +18,8 @@
         %td= link_to h(supplier.name) , supplier
         %td= supplier.phone
         %td= supplier.customer_number
-        %td= link_to "Artikel (#{supplier.articles.count})", supplier_articles_path(supplier)
-        %td= link_to "im Lager (#{supplier.stock_articles.count})", stock_articles_path
+        %td= link_to "Artikel (#{supplier.articles.undeleted.count})", supplier_articles_path(supplier)
+        %td= link_to "im Lager (#{supplier.stock_articles.undeleted.count})", stock_articles_path
         %td= link_to "Lieferungen (#{supplier.deliveries.count})", supplier_deliveries_path(supplier)
         %td
           = link_to "Bearbeiten", edit_supplier_path(supplier), class: 'btn btn-mini'