Are you guys sure PGSW is operating in that building now? Your photos show their logo, but could they be other occupants?
According to CA's corp database, their HQs has been using a Palm Beach mailbox since at least July 2006. Mapquest shows it's located about 1.79 miles from Durland's address. Doesn't make sense to use a mailbox now for a HQ's address when that building is pretty nice.
277 ROYAL POINCIANA WAY SUITE 153 PALM BEACH FL 33480