New users of different sportsbook mobile apps will all need to provide details of their personal information during the registration process to verify their identity. While some may be wary of providing this information, it is very safe due to the safe encryption each sportsbook app requires to boost cybersecurity. New users must disclose their full name, date of birth, gender, home address, email address, phone number, and the last four digits of their social security number. Social security numbers are required as they're used to identify each user's account to deter people from creating multiple accounts.