Activation lock without previous owner with me

Here are the Apple support pages that outline the Activation Lock - and the only mechanisms by which it can be turned off:

Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Turn off Activation Lock – Apple Support

As you will discover, unless you are the owner of the AppleID that was last used to activate the device, or unless you can secure the cooperation of the previous owner, you’ll not be able to defeat or bypass the Activation Lock. Without documentary evidence that you are the original owner (such as sales receipt showing the serial number), Apple won’t assist - and nobody here will be able to help you.

If you do have appropriate documentation, you can contact Apple Support using the Contact Support link at top-right of this page. Alternatively, the technicians at the Genius Bar of your local Apple Store may be able to assist.

If you are the owner of the AppleID that previously activated the device - and 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:

If you forgot your Apple ID - Apple Support

More information about recovery of your AppleID password:

If you forgot your Apple ID password - Apple Support

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

You have what receipt? The original purchase receipt from Apple with the iPad Serial Number clearly printed on it? Or a receipt from the seller?

The only receipt Apple will accept is the original purchase receipt with the serial number on it. If you don't have it, you don't have what it takes for Apple to help you.

If you can't reach the previous owner, you've been scammed and you've purchased a useless device. Either get the previous owner to remove Activation Lock, or get your money back. If neither is possible, recycle the iPad responsibly.

See this user tip I wrote about used devices --> The All Too Common SAD Reality of Buying … - Apple Community