The Cash app supports instant payment. Why Can’t I Add Cash To My Cash Thus, funds are instantly added to the cash portfolio. Also, remember to check the value you entered before continuing to click the Add button. Alternatively, you can pay from your wallet or pay merchants using your Cash Visa debit card. Manually enter the amount you want to add to your wallet using the keyboard and click the Add button. Finally, you need to verify your identity with a PIN or password although, you need to visit our website.