There’s no situation where you should share a six-digit verification code — not even with customer service or tech support. If someone asks you for your code, it's likely a scam.

Google Messages is currently testing a second verification method for ensuring you're texting with the person you think you are.

Google Messages is rolling out QR code-based key verification to confirm that you’re “communicating with the person you intend to.” ...

When you receive the code, enter it here. WABetaInfo says that when the first attempt to log into a WhatsApp account is successful, another six-digit code will be needed to complete the process.