Password System
What is your question?
ArenaNet Communications Manager
Yes, there are certain requirements and you can read why in the following article on account security: https://www.guildwars2.com/en/news/mike-obrien-on-account-security/
When you see that millions of personal credentials have been harvested from various websites and company databases — including one that occurred very recently and involved the capture of personally-identifiable information belonging to more than 150 million people — I’m feel sure you’ll appreciate that we want to do our utmost to help you protect your account and your personal security.
Communications Manager
Guild & Fansite Relations; In-Game Events
ArenaNet
-Digging through storage to find the Serial Number box.
As far as the serial number goes – 1 – it helps but it’s not necessary if you can provide enough other info to support (although it is the easiest route).
2 – on most smartphone platforms there are password management apps. Most have a section (that I’ve seen) for software licenses – I keep my serials not on steam there. (I use 1Password for iPhone, got it on sale a while back, it’s been great, slowly eyeing the desktop version)