Activation lock
I need to unlock the iPad that my mom gave me but no one knows the Apple ID or password. Is there anything I can do?
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Activation Lock requires the Apple ID and Password of the person who set the lock. It is a theft prevention feature. Check these links...
How to remove Activation Lock - Apple Support
https://iforgot.apple.com/password/verify/appleid
Apple will help if you can produce the original receipt clearly showing serial number.