So basically i don’t have serial code, probably deleted that registration email containing it while ago while clearing mail inbox (its from prepurchase from official site – april 2012). Now im basically waiting till you guys block my account for simply returning to the game 2 months ago and playing the game 0_o. Also be more precise in stating reasons, this email doesn’t answer why it will get blocked/restricted at all and looks more like phishing attempt with this vague info – “abnormal login”, “currency transactions”, would ignore if it wasn’t sent from ArenaNet email.
Good to know that, no need to worry then.