The foreign affairs department undertakes the responsibility of all foreign affairs, pertaining to the relations of the Khilafah state with the foreign states, whatever these affairs and relations may be. Whether they are related to the political aspect and what it entails like the formation of pacts, peace treaties, cease-fires, negotiations, appointing ambassadors, sending Messengers and delegates, and establishing embassies and consulates. It also includes relations, which are related to economical, agricultural, and trading matters as well as postal communications or wire and wireless communications etc. The foreign affairs department runs all these matters, because they are concerned with the relations of the Khilafah state with other states.

The Messenger (pbuh) established foreign relations with other states and entities. He sent ‘Uthman bin ‘Affan to negotiate with Qur’aysh just as He negotiated with the delegates of Qur’aysh. He sent delegates to Kings and He received the delegates of Kings and leaders. He also concluded pacts and peace treaties. Similarly after him, his Khulafaa’ used to establish political relations with other states and entities. They used to appoint people to carry out these actions on their behalf, on the basis that whatever an action a person can perform by himself, He can delegate it to some other person to carry out it on his behalf.