If you get that the Cash app won't let me send money by using a credit card, then you must check the following things to resolve this issue. So, first, ensure your card not expired as well as you didn’t enter the wrong details of the card. Along with it, you must ensure that your credit card has an available limit to make transactions. And, if you have still any queries, then contact our support team for help. https://www.7qasearch.net/blog/cash-app-wont-let-me-send-money/