The Epic of Aerth
Letter of Commission
A Letter of Commission is a formal writ given to explorers, adventuring groups, ships crews, and mercenary companies.
The practice developed in the middle period of the Alphatian Empire during the reign of
that guy as a way to legitimize the growing number of mercenary companies and local militias. Eventually the practice was extended to include any armed group that wished to operated under at least the appearance of legitimacy.
Currrently, virtually every derivative government of the now defunct Empire will offer some sort of Letter of Commission.