If Cash App Payment Failed, you just need to check these things:When I try to make a payment from the Cash app, this message flashes "Declined Payment ".Card expired. Use another card. Next, "Declined . Please check your card number, expiration date, CVV, and zip code." Rejected. Use another card." Then, you will need to contact the card-issuing bank to confirm the details. You must verify that the card details entered are correct and match those on the card. However, Visit our website to resolve your issue.