In most of the kingdoms of Easternia. Adventurer, are required to register as an adventure company. Adventure companies can be mercenaries, adventurers, travelling service companies etc. When one forms an adventuring company, they are required to pick three colours for their company and a name. You pay a 25 gp fee to form the company and are given a book to have signed by the adventure company representative at each town and place you go, sort of like a passport. It is at that time you are to declare any fees prizes and treasures the company has earned between check-in and pay their tax.