body: For US-Law:
  
  
  Can a freelancer charge a client late fees for late payments if they are not explicitly drawn out in a contract? 
  
  
  For example, let's say the freelancer has a contract for an hourly rate only, and no articles related to fees. However, the client has not paid for weeks and the freelancer notifies them he will charge a late fee if not paid in n days. 
  
  
  Is this viable? Will it holdup? Or is it an ambiguous situation?
  
  
  
title: Can a Freelancer charge late fees if not explicitly defined in the contract?