Emails from the cash or box team will only link to square.com, squareup.com, cash.app, or cash.me, cash. app/help. If the email contains a link to another website, Square will not send it. cash app/assistance, or through a voice connection provided to Cash app customers. Cash App Support will not ask for a login code, PIN, Social Security Number (SSN) and will not ask you to send payments, purchase or download remote access applications. Or perform a “test” of any transaction. However, you should visit the website for more information.