Thanks for sending the proof of purchase for this product:
Product: IPAD WIFI CELL 16GB SILVER-THA
Serial number: DLXMX7UBF4YH
After reviewing the provided documentation, we have turned off Find My iPhone Activation Lock on your device. You can now perform a recovery-mode restore to erase the device and set it up with a different Apple ID.
For more information on how to perform a recovery-mode restore, see this article:
iOS: Unable to update or restore
http://support.apple.com/kb/HT1808
Warning: When you restore the device and remove the current Apple ID, all data associated with that Apple ID will be deleted from the device and will not be restored when you set up a different Apple ID. This includes, but is not limited to, iTunes and App Store purchases, content stored in iCloud, and any iMessage conversations.
Please contact us by phone if you have any other issues or questions. To find the right phone number, see this article:
http://support.apple.com/kb/HE57
Thanks for contacting AppleCare.
Sincerely,
Carla
AppleCare Account Security