Emails from the cash team or cash box will only link to square.com , squareup.com , cash. app or cash.me , cash.app/help. However, if the email contains a link to another website, Square will not send it. application / financial assistance or via the voice link provided to cash app support applications in the Cash application. However, Financial Aid will not ask for entry codes, PIN codes, social security numbers (SSN), nor will it ask you to submit payments, purchases, or download remote access applications. Or "test" any transaction. However, you should visit the website for more information.