Scams

Scams occur when one player or group of players deceives another player out of money, goods, or enjoyment in-game. The only way to fall victim to a scam is to be ignorant; knowledge, and a little common sense, will protect you from any scam another player tries.

Identifying a Scam
In general, any offer that appears to be too good to be true probably is a scam. Scammers will often approach you directly, via whisper, with their offer, instead of announcing it on !All or $Trade. This allows them to avoid anybody else ratting them out. If in doubt to whether a deal is genuine, ask on a public channel! And, if you catch a scammer in the act, be sure to let everyone around you know what he's up to.

Item Scams
Item scams exploit traits of items to convince somebody he's getting something he isn't.

Selling Armor
All armor in Guild Wars is customized to the character that purchased it. This means that, while it can be traded to others, nobody else can actually wear it! The most anybody can do with a piece of armor is salvage it.

Selling Customized Weapons
Whenever you buy a weapon from another player, look at it closely. If you see a line stating that it is customized for that player, you will be unable to equip the weapon if you buy it! This is the same as the armor scam.

Decustomization
Often, a player attempting a scam with armor or weapons will tell you that a decustomization vendor will remove the old customization, allowing you to equip the armor or weapon. This is blatantly false; there is no decustomization vendor, and any customized equipment you buy will be useless!

Unidentified Items
This is not necessarily a scam, but it is definitely worth mentioning. As you probably know, using an Identification Kit on an unidentified item will show you what properties that item has. If the properties come from a rune or weapon upgrade, you will unlock that rune or upgrade for use on PvP characters. Merely purchasing an already-identified item does not unlock like this, so a thriving market in unidentified items exists in Guild Wars.

However, there are three good reasons not to buy unidentified items. Firstly, the odds of you unlocking a rune or upgrade you can actually use is extremely rare. Secondly, the seller can actually salvage the item before identifying it, which will, if the item holds a rune, tell you the strength and the profession of that rune. This allows you to purchase something far more likely to give you an item you can use. Finally, if you're purchasing the item to replace current equipment, the level of rarity of an item does not directly correspond to its power. A purple isn't necessarily stronger than a blue, and a gold isn't necessarily stronger than a purple.

In general, unless you have very good reasons for doing so, you should avoid buying unidentified items.

Trade Scams
Trade scams involve trading between two or more players. Trade scams all rely on the scammer confusing you into believing him over the game window. Remember this important rule: the game window is always right!

"I'm bugged!"
The buyer will submit nothing on his side of the trade, and when you ask him about it, he'll claim to be "bugged," and that he actually submitted the item you were trying to buy from him. While it is entirely possible to be bugged in trade, it is not possible to be bugged in this way. If the trader claims to be bugged, ask him to relog, and do the same yourself. If he resists or refuses, or if the problem doesn't go away, he is a scammer, and you should not trade with him.

Bait and Switch
Often, scammers will submit an item that is not what you agreed upon. However, this is likely to get the scammer caught, so they make sure you're in a hurry first. They will usually do this by repeatedly closing the trade window in the middle of the trade, and claiming he's "glitched", until eventually, you're hitting accept as fast as possible to outrace the "glitch." When he finally submits an item, it's junk that you don't want, and in your unthinking hurry, you hit accept anyway. Don't fall for this.

Deferred Trades
This is a broad category of scams, but they all have the same scam element: the scammer will have you trade him an item or money, in return for an item or money he (or some other scammer) will supposedly trade you right back. This often takes the form of the three-way trade. The scammer says "I have Item A, which this guy here wants. I want Item B, which you have.  And you want Item C, which this guy here has.  So, you give me Item B, I'll give him Item A, and he'll give you Item C." Of course, as soon as you part with your Item B, they both leave or log off.

Impersonation Scams
Impersonation scams are scams in which the scammers act as ArenaNet staff.

Username/Password Requests
Never give anybody your username or password. Ever. ArenaNet will never ask for it; not through email, not through a whisper, never.

Sigil Status
This is targeted at EverQuest players, who needed to have GMs approve their guild creation in a chat room. In this game, all guild management is taken care of in-game, so the scam has no basis in fact. Basically, a scammer will tell you that, to get your Celestial Sigil, you must pay a GM gold, and he'd transfer the status onto you, allowing you to buy a guild hall. Don't do it! Sigils can only be purchased from other players or the Sigil Trader, or be earned in the Hall of Heroes.