Bank of Vivaldi - what are the consequences (The Witcher 3: Wild Hunt)

Hello.
When you approach him and take a loan, he says that he has his own methods of returning from defaulters.
Three days in the game, silence, I didn’t count the game time, perhaps more than a week, that’s for sure.
Has anyone seen what will happen?))
I searched the wiki for a section about him, I did not find anything.