Thank you for contacting Intel Community.
I am sorry to tell you that all of MAX7000 devices have been obsolete for few years. Please consider to use the latest Intel FPGA devices which are MAX II, MAX V, and MAX 10.
Apart from that, sorry to let you know that, we do not provide part marking verification in order to avoid the devices from grey market.
Intel PSG has its authorized distributor to sale Intel devices. If you got the devices from formal distributors, you shouldn’t worry on the device authenticity as the devices must be valid units. Otherwise, we do not ensure the device quality and do not provide the further service. You may find the authorized distributor list from the link below: