# Use cases

Canonical: https://mobilevalidate.com/use-cases

- [Account security and takeover risk](https://mobilevalidate.com/use-cases/account-security.md): Check the phone number or e-mail address a user adds or changes on an account, and step up verification when the signals suggest takeover risk.
- [Call-center and spam screening](https://mobilevalidate.com/use-cases/call-center-screening.md): Screen inbound callers and outbound dialling lists by line type and carrier and, where enabled, by spam-report reputation for US, CA and DE numbers.
- [Channel selection for consented messaging](https://mobilevalidate.com/use-cases/channel-selection.md): See which messaging apps an opted-in customer's number uses, such as WhatsApp, Telegram, Viber, iMessage or RCS, and send on a channel that arrives.
- [Lead and form verification](https://mobilevalidate.com/use-cases/lead-verification.md): Check the phone number and e-mail address on a lead form in one request, so fake, mistyped and low-quality leads are flagged before sales calls them.
- [OTP and sign-up fraud prevention](https://mobilevalidate.com/use-cases/otp-and-signup-fraud.md): Check a phone number's line type and messenger presence before sending a one-time passcode, so fake and high-risk sign-ups are reviewed first.
- [SMS cost reduction and deliverability](https://mobilevalidate.com/use-cases/sms-cost-reduction.md): Remove invalid, duplicate and unreachable numbers, and route messages people expect over the channels they use, before paying for SMS.