Hello munirmdee,
What you are seeing is related to Activation Lock. This is a security feature, in part to deter re-selling of stolen devices. --> http://support.apple.com/HT201365
An activation lock can only be removed using information for the account that applied the lock. If you know this information follow the onscreen steps to enter the Apple ID and password used to set up the device, or enter the device passcode.
Apple does provide a variety of ways for a user to recover forgotten log-in information. A person in the same household might have sufficient familiarity to other accounts or devices the deceased relative used and could attempt to recover that information. For example, an Apple ID is usually an email address the person used. Click on this link to read what to do "If you forgot your Apple ID" --> https://support.apple.com/HT201354 Click on this link to read what to do "If you forgot your Apple ID password" --> https://support.apple.com/HT201487
If the required information cannot be discovered, the official owner of the deceased person's things as can be proven by documentation needs to try one of these things:
Read this link to discover "How to request access to a deceased family member's Apple accounts" [and devices] - https://support.apple.com/HT208510
OR
- Apple can remove a lock if a person can provide sufficient evidence of valid ownership. Do this online here --> https://al-support.apple.com/#/additional-support Apple says, "Proof of ownership documentation is required," but does not state what constitutes proof. This might be similar to what is required in the previous section.
Alternatively you may be able to do this at an Apple Store.
