Sending money by WU to unknown guy means 100% loss of money . U can only forget money after.
U cant claim WU as WU dont provide Escrow service . Thet have no responsiblity after.
Check their privacy policy at
www.westernunion.com . They clear say " never send money for business or Unkonwn who claim something exceptional "
If you are doing its completely your risk..
WU is the easiest way to cheat for dogs ( cheaters ).