Hadith 4656
وَعَن أبي الْعَلَاء بن الْحَضْرَمِيّ أَنَّ الْعَلَاءَ الْحَضْرَمِيَّ كَانَ عَامِلَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَكَانَ إِذَا كَتَبَ إِليه بدأَ بنفسِه. رَوَاهُ أَبُو دَاوُد
It is narrated from Abu Al-Ala bin Hadhrami that Alaa Hadhrami (may Allah be pleased with him) was the governor of Bahrain appointed by the Messenger of Allah (peace and blessings be upon him), and when he wrote letters to you, he would begin with his own name (from Alaa). Its chain is weak, narrated by Abu Dawood.