There was a gold duping bug that was exploited and used on servers last week. I'm not sure how many servers this happened on but here's what happened. Someone discovered a gold duping bug, and started giving away mass ammounts of gold (200g per person) to hundreds of people, this spreaded quickly to other servers. There was rolling restarts to fix the gold duping bug, and a few hundred blizz accts have been temporarily suspended for accepting the gold. So if your one of the people who got this gold here's what you do so you hopefully don't get detected.
Send the ammount that you recieved from the gold dupers to an alt, then send it to another alt, then another, and then another, now leave the gold on that alt for a few days, maybe a week. Make sure you DELETE the mail logs AFTER taking the gold out, after a week send it back to your main.
Servers known that this happened on:
Mannoroth (US) - Originated On
Darkspear (US)