I always thought the security mnemonic was just a formality. Turns out at alphabay, even if you're able to tell them every single detail about your account, if you don't have the mnemonic entirely they won't even have a conversation with you if you forgot your PIN. I entirely know this is my fault, and I'm willing to take this as a loss and a sorta expensive lesson, but shit man I didn't think it would be such an important thing. Welp lesson learned.
Always record every detail a marketplace gives you on signup