better if readability

lib/submitters.rb

@@ -30,7 +30,7 @@ module Submitters
   end
 
   def send_signature_requests(submitters, params)
-    return unless params[:send_email] == true || params[:send_email] == '1'
+    return if params[:send_email] != true && params[:send_email] != '1'
 
     submitters.each do |submitter|
       next if submitter.email.blank?