You must speak to Anders Blackhammer at the Crossroads to receive some coin compensation. He is not always up, as he is used in several quests. If he's not up then you just have to sit around and wait.
When you speak to Anders he will attack you. He is a level 20 solo mob. You do not need to kill him in order to complete the quest. Just engage him.
Brandus has told me I can collect the money from his last venture from a business partner named Anders Blackhammer. I am supposed to be able to find him at the Crossroads in the Commonlands and should tell him that Brandus sent me.
I should seek out Anders Blackhammer at the Crossroads in the Commonlands.
I should find Anders Blackhammer and collect the money
I found and spoke briefly with Anders Blackhammer.
Anders attacked me after I hailed him. Brandus lied and double crossed me.
I shouldn't have expected any less from someone like Brandus. Anders attacked me when I hailed him, the double crossing void spawn.