Note: This trick is used best if you log off right afterwards because once the person has realized that you didn't give anything, they will be mad...you won't be able to do any more trades there if the person you traded with tells people about that...or you can just change chars...(-;.

Step 1: Do the window glitch.

Step 2: Have someone open a trade window with you. Note: From this point on, only use "Up" on the D-Pad. So you always choose deposit/meseta.

Step 3: Add the items to the trade window that you want to falsely trade. At the end of this, you will get their item, but they will not get yours. Then Cancel and deposit all of the items that you are not trading first. Then at the end, deposit the item(s) that you want to trade, but do not cancel them from the trade window. They will appear in the trade window, even though they are in your bank. Confirm the trade.

Step 4: After you trade, I'd recommend you quickly log off because once the person discovers that they didn't get anything, they will be VERY mad... but as you can see in the next picture, I have the item I traded for and the item that I traded...They didn't get anything.