I noticed that when you transfer items it says the number of items you're sending, but not what those items are. If you have a huge hoard, it means scrolling through the long list all over again just to find what's highlighted blue. It only tells you what items you sent after you send them. It would prevent accidentally sending the wrong item if it told you before as well, instead of just the amount. It hasn't happened to me yet, but I'm sure it has to other users.

For clarity, the message would not show on a different page; it would be similar to how it is now when you send items. The same popup would be displayed but it would name the items instead of just the number. In addition to that, sending multiple of the same item would make the number of items appear next to it, rather then listing them all off.
-Mockup-

Before

After

(courtesy of Robert [frye'd])

-Addon suggestions-
The option would be able to be toggled on and off, so you can keep it the way it is now if you want (Shadow2002)