Need some help with real vs fake

[sabor]

Okie so heres the situation. I sold this guy an original copy of my 300 on blu-ray. A week later he calls me and complains that it is not legitimate and is FAKE KNOCKOFF. Now that boils my blood because I personally purchase this blu-ray disc directly from amazon. Hes telling me some BS about the graphics not being on par with the version he rented or something like that and the graphic on the disc itself is kind of faded compare to the one he rented at blockbuster.

Lastly, he told me that every authentic blu-ray movie should have a code on the back of the disc where the player reads (the scratch resistant coating side). The code should start something like BVS-(numbers). Is that true? I am looking at my copy of 300 that I personally purchased from Best buy and it does not have this code he was talking about.

Heres the problem, he said the version he rented from blockbuster had it, but the disc I sold him did not have that code and every blu-ray disc should have it. Well I looked at my copy and it did not have that code. If anyone knows more about this, can you please chime in because I am really PO and confused.