The primary reason a sportsbook asks for your SSN is to verify your identity. Why exactly does the sportsbook need your SSN? Why Do Betting Sites Ask for SSNs? This may keep you from signing up for an online betting site, but it's part of the process.
Then, there's entering your full Social Security Number, or at least the last four digits. Users may not mind inputting their email address or phone number, but it gets a little personal with your home address. Signing up for an online sportsbook can be an exciting time for bettors, but it sometimes feels a little invasive.
