Nutriday Competition: invisible code

Bought a Nutriday yoghurt in Spar Park Station because they are running a competition where you can win 1000 rands hourly. The package said i should enter the unique code which was supposed to be close to the best before date. I checked the whole container it did not have the code nor did it even have the best before date. Could this have been an intentional plot and is it not a requirement by law to have a best before date on a food product? <div><br></div><div><em>(Supplier name changed from C***** to Danone Sa by Hellopeter.com)</em></div>