Handle Facebook Connect and regular registration form (merge account) [duplicate]

1. How do I merge duplicate Facebook accounts?
2. Does Facebook allow duplicate accounts?
3. Can I have 2 Facebook accounts with same email?
4. What happens if I have two Facebook accounts?

How do I merge duplicate Facebook accounts?

Since it goes against our Community Standards to maintain more than one personal account, we don't have a way to merge multiple accounts. However, you can manually switch to one account and keep the information that's important to you.

Does Facebook allow duplicate accounts?

Facebook is a community where people use their authentic identities. It's against the Facebook Community Standards to maintain more than one personal account.

Can I have 2 Facebook accounts with same email?

Although it isn't possible to create two separate Facebook accounts from one email address, it is possible to use Facebook as two or more separate entities from the same Facebook account.

What happens if I have two Facebook accounts?

The main reason is that Facebook doesn't allow users to have more than one personal account — it's against their Terms of Service. So if they find out you have two personal accounts, they'll shut them down.