Write an article based on this "Ask the previous owner to remove the iPhone from Find my iPhone. Sign into https://www.icloud.com in a web browser. Click Find my iPhone. Click All Devices. Click the iPhone or iPad with the activation lock. Click Remove from Account. Follow the on-screen instructions to confirm removal."
This is the easiest and fastest way to release the activation lock. The remaining steps in this method should be followed by the previous owner. The previous owner must use the account that's logged into your iPhone or iPad.  A list of associated iPhones and/or iPads will appear.  If you don't see this option, click All Devices again, then click Delete next to the iPhone or iPad. Once the iPhone or iPad is removed, the iPhone or iPad will no longer be locked.