“The seal used on important letters by the Prophet (SAW) was kept by:”

"Hazrat Hanzla (RA) was entrusted with the Prophet Muhammad (SAW)’s seal for important letters a role reflecting his trustworthiness in early Islamic administration. The seal authenticated official correspondence crucial for diplomatic and religious communication. This responsibility underscores the organized nature of the Prophet’s leadership and the roles of companions in supporting his mission. Studying such details highlights the administrative aspects of early Islam illustrating the structured governance that facilitated the spread of Islamic teachings and community cohesion."