Elders can contact congregations in other lands by sending correspondence to their own branch using jw.org.
وَلِلِٱتِّصَالِ بِجَمَاعَتِهِ ،‏ بِإِمْكَانِ ٱلشُّيُوخِ أَنْ يُرْسِلُوا رِسَالَةً عَبْرَ ٱلْمَوْقِعِ ٱلْإِلِكْتُرُونِيِّ إِلَى ٱلْفَرْعِ فِي بَلَدِهِمْ .‏