diff --git a/app/assets/javascripts/registrar/application.coffee b/app/assets/javascripts/registrar/application.coffee
index 9dda64de6..943f14a23 100644
--- a/app/assets/javascripts/registrar/application.coffee
+++ b/app/assets/javascripts/registrar/application.coffee
@@ -27,3 +27,16 @@ $(document).on 'page:change', ->
         form.find('.js-ident-tip').show()
 
   $('.js-contact-form').trigger('restoreDefault')
+
+  $('[data-legal-document]').each (i, fileInput)->
+    minSize = 8 * 1024 # 8kB
+    maxSize = 8 * 1024 * 1024; # 8 MB
+    $(fileInput).closest('form').submit (e) ->
+      if (files = fileInput.files).length
+        fileSize = files[0].size
+        if fileSize < minSize
+          alert 'Document size should be more than 8kB'
+          return false
+        else if fileSize > maxSize
+          alert 'Document size should be less than 8MB'
+          return false
diff --git a/app/models/epp/contact.rb b/app/models/epp/contact.rb
index d732cad74..fef4c3eda 100644
--- a/app/models/epp/contact.rb
+++ b/app/models/epp/contact.rb
@@ -5,6 +5,7 @@ class Epp::Contact < Contact
   self.inheritance_column = :sti_disabled
 
   before_validation :manage_permissions
+
   def manage_permissions
     return unless update_prohibited? || delete_prohibited?
     add_epp_error('2304', nil, nil, I18n.t(:object_status_prohibits_operation))
diff --git a/app/models/epp/domain.rb b/app/models/epp/domain.rb
index 3ac02c721..991c6d9ba 100644
--- a/app/models/epp/domain.rb
+++ b/app/models/epp/domain.rb
@@ -6,6 +6,7 @@ class Epp::Domain < Domain
   attr_accessor :is_renewal, :is_transfer
 
   before_validation :manage_permissions
+
   def manage_permissions
     return if is_admin # this bad hack for 109086524, refactor later
     return true if is_transfer || is_renewal
diff --git a/app/models/legal_document.rb b/app/models/legal_document.rb
index 5aef34675..e807ae2f7 100644
--- a/app/models/legal_document.rb
+++ b/app/models/legal_document.rb
@@ -9,6 +9,9 @@ class LegalDocument < ActiveRecord::Base
 
   belongs_to :documentable, polymorphic: true
 
+
+  validates :body, length: { minimum: (1.37 * 8.kilobytes).ceil }, if: ->(file){ file.path.blank? && !Rails.env.staging?}
+
   before_create :add_creator
   before_save   :save_to_filesystem
 
diff --git a/app/views/registrar/contacts/form_partials/_legal_document.haml b/app/views/registrar/contacts/form_partials/_legal_document.haml
index 7875e99c8..bffa69831 100644
--- a/app/views/registrar/contacts/form_partials/_legal_document.haml
+++ b/app/views/registrar/contacts/form_partials/_legal_document.haml
@@ -10,4 +10,4 @@
         = f.label :legal_document, t(:legal_document)
         %p.help-block= t(:legal_document_max_size)
       .col-md-7
-        = f.file_field :legal_document, :value => ''
+        = f.file_field :legal_document, :value => '', data: {legal_document: true}
diff --git a/app/views/registrar/domains/_form.haml b/app/views/registrar/domains/_form.haml
index 79771b118..83ad8add0 100644
--- a/app/views/registrar/domains/_form.haml
+++ b/app/views/registrar/domains/_form.haml
@@ -18,7 +18,7 @@
               = label_tag 'domain[legal_document]', t(:legal_document), class: c
               %p.help-block= t(:legal_document_max_size)
             .col-md-7
-              = file_field_tag 'domain[legal_document]', required: fr
+              = file_field_tag 'domain[legal_document]', required: fr, data: {legal_document: true}
     .col-md-4
       %p.domain-general-help= t(:domain_general_help).html_safe
       %p.domain-admin-contact-help= t(:domain_admin_contact_help).html_safe