Any messages I get that has a code and that is not from Sony themselves. I ignore and delete. 3 weeks a go this random dude messaged me about this welcome back again thing and told me send this message to 50 of my PSn friends and then the code he suppplied in the message will get me $50 credit on the PS Store. I replied to the sender telling them no spam then reported the sender to Sony showing they also using false codes to try to lure people into there scams then deleted the message. I have yet to ever hear from that person again. If Sony sends you a code via PSN and They have done so. You willl 100% know its from Sony. It wont be a random message from some random PSN user.