What is a negative bill? Support Back Market October 01, 2020 15:11 Updated A “negative bill” means your virtual wallet does not have enough money to refund customers in the case of a return. Related articles How soon can I get my money back? How do you generate an invoice for a client effectively? What is my virtual wallet and where can I see the balance? Where can I follow regularly the market trends? Why is Back Market taking a deposit?