The Lip Out quest in Gray Zone Warfare is another Handshake request, and this time he wants you to find a missing person. It was an individual who regularly visited the Midnight Sapphire resort, and he wants you to find out more about them.
Lip Out Task Guide – Donald J. Dortmunder – Gray Zone Warfare Guides
For anyone who has been to the Midnight Sapphire area, this is a location filled with enemies with itchy trigger fingers. You need to be careful when exploring this area in GZW, and knowing where to go can make your life a lot easier. We can help you figure out where to go and where you can find out more about Donald J. Dortmunder and what happened to him.
There are two locations you need to visit to find out what happened to Donald. The first is the golf course on the northwest side of Midnight Sapphire, and the last location is by the house in the north. For the first location, visit landing zone (LZ) Foxtrot 1, which you probably used to visit Hunter's Paradise, completing missions like One Shot, One Kill.
From Foxtrot 1, head east and go around the large wall protecting the golf course. When you arrive, head south and look for the large building on the edge of the golf course in GZW. This should be the reception area. There should only be a few NPCs patrolling and protecting it, but you might be unlucky if they hear gunfire nearby. Enter the building and look for the reception area, where you can find a guest list. Interact with it, and this will complete the first part of the quest. You might have been lucky enough to avoid this area, by completing quests like Crime Doesn't Pay.