Here's how it works. Scammers target people who post things for sale on sites like Craigslist or Facebook Marketplace.The scam: The fix: At no time do you enter a Google Voice number as a forwarding number. The scam where you tell them the verification code that gets sent to your number? Google Voice scams occur when fraudsters link a Google Voice number to your phone number. All they need is a unique verification code that they get from you. To prevent unwanted access to your account, it's important you don't reply to any requests for your verification code. Fraudsters will sign their targets up for Google Voice to access their verification code and hijack the account and personal information. The point of the scam is that scammers want to steal Google Voice phone numbers from Google. What will happen is that you can no longer use that phone number to obtain a Google Voice number for yourself.