One and only simple method to fix your negative Cash App balance is to add money to your Cash App wallet. And you can add money to your Cash App card in many ways. You either can transfer money from your linked bank account to the Cash App wallet or visit any retail store. Yes, take it on a serious note that with the help of many popular retail stores, you can add money to your Cash App card with ease of mind. More info: https://quickutilities.net/blog/cash-app-overdraft