Security Code Verification

I must be blind or something but I cannot find where to verify the security codes for my Nautilus Mini. I believe I have some copycat atomizers. I seem to burn through them even when the tank is full, I always prime the new atomizer and wait at least 5 minutes before I take a hit but within about a quarter of a tank all I get is that nasty burning taste. I bought all my filters online from what I thought was a reputable seller. I have purchased probably 10 boxes from them now I seem to have this problem. I just placed an order 3 more boxes but I will definitely need to verify the codes on those when I get them. Someone please help me.
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