This scam is all about taking gold from someone who purchased it online from a seller. It takes place in the AH.
Some gold selling companies now make gold transaction in the AH. (example: you put a Grey/white item in the AH for a ridiculous amount of money, and gold company buys is and you get the gold)
You search your AH for a high price usually over 500g, crap item. You see who is selling it and make an character with a similar name. (EXAMPLE: their name is Wall....you make your name Wåll)
FOR THE LETTERS: chexed.com/ComputerTips/asciicodes.php
Then you go onto that character, and put the same item in the AH for the same price.
Later, the gold sellers will buy your item as well as theirs, Ussaly they do this sometimes they buy yours or the other dudes
You can get a warning from this as the names are warnings lol. But you can not get banned for scamming the gold buyersl