Hi Isagani,
I am really sorry to inform you that we can't confirm the part marking verification in order to avoid the devices from the grey market.
However, I can suggest one way in which Intel PSG has its authorized distributor to sell Intel devices. If you got the devices from formal distributors, you shouldn’t worry about the device authenticity as the devices must be valid units. Otherwise, we do not ensure the device's quality and do not provide further service. You may find the authorized distributor list from the link below:
Intel® Authorized Distributor
Hope this helps.