wiring funds to Oxxo or Coppel

Casa Juan, you do not identify the Oxxo or Coppel location, just the city of Zihuatanejo. As stated above, the Western Union site will ask for recipient's name(as shown on I.D.) the recipients address which should also match that of their I.D. Once you register and log onto the Western Union site, it will have pretty easy to follow instructions.