forgot apple id and password

If you have forgotten your AppleID or associated password, these can be recovered here:

https://iforgot.apple.com

To recover your credentials, you’ll need access to one of the following:

• Your primary email address mailbox that corresponds with your AppleID
• Any of the secondary/recovery email addresses that should be configured for your AppleID account
• Any of the trusted telephone numbers (fixed line or Cellular/Mobile) that are associated with your AppleID

Unless you AppleID account has not been fully/correctly configured, or has been seriously neglected, recovery of the AppleID and password should not be difficult.

More information about recovery of your AppleID:

https://support.apple.com/en-us/HT201354

More information about recovery of your AppleID password:

https://support.apple.com/en-us/HT201487

When you recover access to your credentials, you would be well advised to log-in to your AppleID account from a web browser - and verify/update any email addresses and trusted telephone numbers:

https://appleid.apple.com

Honestly, I have the same problem. My aunt gave the iPhone to me. I logged her account off from the phone, but didn't know that she had her Find My iPhone settings on. After formatting, which was fine to do and accepted, there was an activation lock, with her account, and I didn't even see her Apple ID when I logged it out. I asked her to help me remove the lock, but she said that she completely forgot the Apple Id AND the password! Phone is stuck forever, and still have no idea what to do with it :(