GunBroker Pay is built based on trusted transactions. We need your mobile phone number to make sure it’s really you. We will send a link to your phone for verification while creating your account. We will use a third party system for this verification process. If we are unable to complete successful verification, you will need to be manually verified to continuing setting up your account.
A mobile phone is not required to create an account, but we highly recommend that you add your mobile phone number to your account for additional security.
You can find additional information in this article.