diff --git a/Gemfile b/Gemfile
index 63efe6c7..c967bd8f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,6 +13,7 @@ gem 'devise-two-factor'
 gem 'dotenv', require: false
 gem 'email_typo'
 gem 'faraday'
+gem 'faraday-follow_redirects'
 gem 'google-cloud-storage', require: false
 gem 'hexapdf'
 gem 'image_processing'
diff --git a/Gemfile.lock b/Gemfile.lock
index d07463b2..9ab1ed46 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -189,6 +189,8 @@ GEM
     faraday-em_http (1.0.0)
     faraday-em_synchrony (1.0.0)
     faraday-excon (1.1.0)
+    faraday-follow_redirects (0.3.0)
+      faraday (>= 1, < 3)
     faraday-httpclient (1.0.1)
     faraday-multipart (1.0.4)
       multipart-post (~> 2)
@@ -580,6 +582,7 @@ DEPENDENCIES
   factory_bot_rails
   faker
   faraday
+  faraday-follow_redirects
   google-cloud-storage
   hexapdf
   image_processing
diff --git a/app/controllers/api/submissions_controller.rb b/app/controllers/api/submissions_controller.rb
index c3000285..36847423 100644
--- a/app/controllers/api/submissions_controller.rb
+++ b/app/controllers/api/submissions_controller.rb
@@ -2,9 +2,6 @@
 
 module Api
   class SubmissionsController < ApiBaseController
-    UnknownFieldName = Class.new(StandardError)
-    UnknownSubmitterName = Class.new(StandardError)
-
     load_and_authorize_resource :template
 
     before_action do
@@ -12,68 +9,83 @@ module Api
     end
 
     def create
+      is_send_email = !params[:send_email].in?(['false', false])
+
       submissions =
         if (emails = (params[:emails] || params[:email]).presence)
           Submissions.create_from_emails(template: @template,
                                          user: current_user,
                                          source: :api,
-                                         mark_as_sent: params[:send_email] != 'false',
+                                         mark_as_sent: is_send_email,
                                          emails:)
         else
-          submissions_attrs = normalize_submissions_params!(submissions_params[:submission], @template)
+          submissions_attrs, attachments = normalize_submissions_params!(submissions_params[:submission], @template)
 
           Submissions.create_from_submitters(
             template: @template,
             user: current_user,
             source: :api,
-            mark_as_sent: params[:send_email] != 'false',
+            mark_as_sent: is_send_email,
             submitters_order: params[:submitters_order] || 'preserved',
             submissions_attrs:
           )
         end
 
-      Submissions.send_signature_requests(submissions, send_email: params[:send_email] != 'false')
+      Submissions.send_signature_requests(submissions, send_email: is_send_email)
+
+      submitters = submissions.flat_map(&:submitters)
 
-      render json: submissions.flat_map(&:submitters)
-    rescue UnknownFieldName, UnknownSubmitterName => e
+      save_default_value_attachments!(attachments, submitters)
+
+      render json: submitters
+    rescue Submitters::NormalizeValues::UnknownFieldName, Submitters::NormalizeValues::UnknownSubmitterName => e
       render json: { error: e.message }, status: :unprocessable_entity
     end
 
     private
 
     def submissions_params
-      params.permit(submission: [{ submitters: [[:uuid, :name, :email, :role, :phone, { values: {} }]] }])
+      params.permit(submission: [{
+                      submitters: [[:uuid, :name, :email, :role, :completed, :phone, { values: {} }]]
+                    }])
     end
 
     def normalize_submissions_params!(submissions_params, template)
-      submissions_params.each do |submission|
+      attachments = []
+
+      Array.wrap(submissions_params).each do |submission|
         submission[:submitters].each_with_index do |submitter, index|
           next if submitter[:values].blank?
 
-          submitter[:values] =
-            normalize_submitter_values(template,
-                                       submitter[:values],
-                                       submitter[:role] || template.submitters[index]['name'])
+          values, new_attachments =
+            Submitters::NormalizeValues.call(template,
+                                             submitter[:values],
+                                             submitter[:role] || template.submitters[index]['name'])
+
+          attachments.push(*new_attachments)
+
+          submitter[:values] = values
         end
       end
 
-      submissions_params
+      [submissions_params, attachments]
     end
 
-    def normalize_submitter_values(template, values, submitter_name)
-      submitter =
-        template.submitters.find { |e| e['name'] == submitter_name } ||
-        raise(UnknownSubmitterName, "Unknown submitter: #{submitter_name}")
+    def save_default_value_attachments!(attachments, submitters)
+      return if attachments.blank?
 
-      fields = template.fields.select { |e| e['submitter_uuid'] == submitter['uuid'] }
+      attachments_index = attachments.index_by(&:uuid)
 
-      fields_uuid_index = fields.index_by { |e| e['uuid'] }
-      fields_name_index = fields.index_by { |e| e['name'] }
+      submitters.each do |submitter|
+        submitter.values.to_a.each do |_, value|
+          attachment = attachments_index[value]
 
-      values.transform_keys do |key|
-        next key if fields_uuid_index[key].present?
+          next unless attachment
 
-        fields_name_index[key]&.dig('uuid') || raise(UnknownFieldName, "Unknown field: #{key}")
+          attachment.record = submitter
+
+          attachment.save!
+        end
       end
     end
   end
diff --git a/lib/submissions.rb b/lib/submissions.rb
index 677466e8..190d6f8a 100644
--- a/lib/submissions.rb
+++ b/lib/submissions.rb
@@ -42,33 +42,9 @@ module Submissions
 
   def create_from_submitters(template:, user:, submissions_attrs:, source:, mark_as_sent: false,
                              submitters_order: DEFAULT_SUBMITTERS_ORDER)
-    submissions_attrs.map do |attrs|
-      submission = template.submissions.new(created_by_user: user, source:,
-                                            template_submitters: template.submitters, submitters_order:)
-
-      attrs[:submitters].each_with_index do |submitter_attrs, index|
-        uuid =
-          submitter_attrs[:uuid].presence ||
-          template.submitters.find { |e| e['name'] == submitter_attrs[:role] }&.dig('uuid') ||
-          template.submitters[index]&.dig('uuid')
-
-        next if uuid.blank?
-
-        is_order_sent = submitters_order == 'random' || index.zero?
-        email = normalize_email(submitter_attrs[:email])
-
-        submission.submitters.new(
-          email:,
-          phone: submitter_attrs[:phone].to_s.gsub(/[^0-9+]/, ''),
-          name: submitter_attrs[:name],
-          sent_at: mark_as_sent && email.present? && is_order_sent ? Time.current : nil,
-          values: submitter_attrs[:values] || {},
-          uuid:
-        )
-      end
-
-      submission.tap(&:save!)
-    end
+    Submissions::CreateFromSubmitters.call(
+      template:, user:, submissions_attrs:, source:, mark_as_sent:, submitters_order:
+    )
   end
 
   def send_signature_requests(submissions, params)
diff --git a/lib/submissions/create_from_submitters.rb b/lib/submissions/create_from_submitters.rb
new file mode 100644
index 00000000..60a0b43c
--- /dev/null
+++ b/lib/submissions/create_from_submitters.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+module Submissions
+  module CreateFromSubmitters
+    module_function
+
+    def call(template:, user:, submissions_attrs:, source:, submitters_order:, mark_as_sent: false)
+      Array.wrap(submissions_attrs).map do |attrs|
+        submission = template.submissions.new(created_by_user: user, source:,
+                                              template_submitters: template.submitters, submitters_order:)
+
+        attrs[:submitters].each_with_index do |submitter_attrs, index|
+          uuid =
+            submitter_attrs[:uuid].presence ||
+            template.submitters.find { |e| e['name'] == submitter_attrs[:role] }&.dig('uuid') ||
+            template.submitters[index]&.dig('uuid')
+
+          next if uuid.blank?
+
+          is_order_sent = submitters_order == 'random' || index.zero?
+
+          build_submitter(submission:, attrs: submitter_attrs, uuid:, is_order_sent:, mark_as_sent:)
+        end
+
+        submission.tap(&:save!)
+      end
+    end
+
+    def build_submitter(submission:, attrs:, uuid:, is_order_sent:, mark_as_sent:)
+      email = Submissions.normalize_email(attrs[:email])
+
+      submission.submitters.new(
+        email:,
+        phone: attrs[:phone].to_s.gsub(/[^0-9+]/, ''),
+        name: attrs[:name],
+        completed_at: attrs[:completed] ? Time.current : nil,
+        sent_at: mark_as_sent && email.present? && is_order_sent ? Time.current : nil,
+        values: attrs[:values] || {},
+        uuid:
+      )
+    end
+  end
+end
diff --git a/lib/submitters/normalize_values.rb b/lib/submitters/normalize_values.rb
new file mode 100644
index 00000000..86f35ab0
--- /dev/null
+++ b/lib/submitters/normalize_values.rb
@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+module Submitters
+  module NormalizeValues
+    CHECKSUM_CACHE_STORE = ActiveSupport::Cache::MemoryStore.new
+
+    UnknownFieldName = Class.new(StandardError)
+    UnknownSubmitterName = Class.new(StandardError)
+
+    module_function
+
+    def call(template, values, submitter_name)
+      submitter =
+        template.submitters.find { |e| e['name'] == submitter_name } ||
+        raise(UnknownSubmitterName, "Unknown submitter: #{submitter_name}")
+
+      fields = template.fields.select { |e| e['submitter_uuid'] == submitter['uuid'] }
+
+      fields_uuid_index = fields.index_by { |e| e['uuid'] }
+      fields_name_index = fields.index_by { |e| e['name'] }
+
+      attachments = []
+
+      normalized_values = values.to_h.to_h do |key, value|
+        if fields_uuid_index[key].blank?
+          key = fields_name_index[key]&.dig('uuid') || raise(UnknownFieldName, "Unknown field: #{key}")
+        end
+
+        if fields_uuid_index[key]['type'].in?(%w[initials signature image file])
+          new_value, new_attachments = normalize_attachment_value(value, template.account)
+
+          attachments.push(*new_attachments)
+
+          value = new_value
+        end
+
+        [key, value]
+      end
+
+      [normalized_values, attachments]
+    end
+
+    def normalize_attachment_value(value, account)
+      if value.is_a?(Array)
+        new_attachments = value.map { |v| build_attachment(v, account) }
+
+        [new_attachments.map(&:uuid), new_attachments]
+      else
+        new_attachment = build_attachment(value, account)
+
+        [new_attachment.uuid, new_attachment]
+      end
+    end
+
+    def build_attachment(value, account)
+      ActiveStorage::Attachment.new(
+        blob: find_or_create_blobs(account, value),
+        name: 'attachments'
+      )
+    end
+
+    def find_or_create_blobs(account, url)
+      cache_key = [account.id, url].join(':')
+      checksum = CHECKSUM_CACHE_STORE.fetch(cache_key)
+
+      blob = find_blob_by_checksum(checksum, account) if checksum
+
+      return blob if blob
+
+      data = conn.get(url).body
+
+      checksum = Digest::MD5.base64digest(data)
+
+      CHECKSUM_CACHE_STORE.write(cache_key, checksum)
+
+      blob = find_blob_by_checksum(checksum, account)
+
+      blob || ActiveStorage::Blob.create_and_upload!(
+        io: StringIO.new(data),
+        filename: Addressable::URI.parse(url).path.split('/').last
+      )
+    end
+
+    def find_blob_by_checksum(checksum, account)
+      ActiveStorage::Blob
+        .joins('JOIN active_storage_attachments ON active_storage_attachments.blob_id = active_storage_blobs.id')
+        .where(active_storage_attachments: { record_id: account.submitters.select(:id),
+                                             record_type: 'Submitter' })
+        .find_by(checksum:)
+    end
+
+    def conn
+      Faraday.new do |faraday|
+        faraday.response :follow_redirects
+      end
+    end
+  end
+end