Cash App access codes are a type of security measure designed to protect your account from unauthorized logins and transactions. The code is randomly generated by Cash App and sent via SMS or email each time you attempt to sign in or make a payment using the app. It's important that you enter the correct access code, as it will keep your account secure from any potential fraudsters. To ensure maximum security, you should change your Cash App access code regularly and use a unique one for each login attempt. Additionally, if you ever receive an unexpected request for an access code when attempting to sign in, don't provide it and report it immediately.