There is no way to tell whether someone has many Snapchat accounts. If you suspect your boyfriend has numerous Snapchat accounts on his phone, try googling his name on Snapchat. This will show all the usernames that have been used for his primary account. He could also be using a fake ID to log in to different accounts. If this is the case, then we recommend that you delete all of his accounts immediately so there are no traces of him anywhere on Snapchat. If you want to check if another user has an account on Snapchat, they must either be friends with you or consent to see your phone. If they aren't friends with you and you both have installed the app, they will receive a notification when you view their information. You can only see other users' names if you are friends with them. If they don't know you yet, they won't be able to add you as a friend until you tell them who you are. Even if they do know you, there's no guarantee that they'll give you access to their information. In addition, only users over 13 years old are allowed to create accounts. If someone under 13 reports an account that isn't theirs, we remove it from use by the owner without notifying anyone else involved.