I've noticed a lot of people complaining about getting robbed in broad daylight in the Auction House, saying that they're not getting something that they payed for.
Here's a quick solution that hopefully would help most of you guys experiencing this problem.

Blizzard have indicated that due to high traffic in the Auction House (bear in mind that it's the weekends now, so more Americans are playing), certain people might not receive their items after being credited.

I've done some tests, and came up with a solution,

Restart your client and re-enter the Auction House, your items should appear in the COMPLETED section. (Remember this ONLY WORKS if you've been credited gold)

P.S : Tests have only been carried out on my account, so it might not work as intended in some cases. So it's important for those who've tried this out to provide feedback in this thread, please... do me a favour lol

The next problem would probably be sending the item to your stash (I know it takes forever sometimes).
I recommend waiting for at least 2 minutes after sending your item to stash because that usually works for me.
I'll conduct more tests later on and see what I can find, can't do shit right now 'cause the Auction House is down.

This post has been edited by barbar554: May 27 2012, 02:57 PM

I'm still trying to solve this matter right now.
So far to only one working is the one which fixes the missing item in the COMPLETED section problem.

5 days is a little... extreme.
Well, the Auction House seems stable for now, I'm able to purchase and receive/send to stash in less than 5 seconds.