Hello,
As a policy, Altera does not validate the authenticity of products purchased from unknown or unauthorized sources.
Altera cannot guarantee that the parts will perform in accordance with Altera device specifications nor meet quality and reliability requirements.
Purchase and use of products from non-authorized sources is at your own risk.
To check basic marking and package outline, please go to: https://www.intel.com/content/www/us/en/support/programmable/support-resources/quality/package-mechanical.html
Best regards,
Nazrul Naim