How to transfer money from greendot to cash app? Both the Cash app and greendot are compatible with each other and you can transfer money from greendot prepaid card to Cash app account. Open the Cash app on the phone, then add greendot debit card to your linked accounts. Tap on the “banking” and then press the “add cash” button and enter the amount of money and then, the Cash app will ask to verify your identity. Tap on the link here to learn more.