How to report a bug in Diablo III
What to do if you are missing the achievement "Heroic: War is Hell" after winning a warfront and completing the quest.
Character didn't receive loot in World of Warcraft.
What to do if you can't find or start this quest.
What to do if you didn't receive loot in World of Warcraft Classic
Information about being unable to trade dungeon/raid/instance loot to another player
デスクトップ版Blizzard Battle.net AppとBlizzardグループでの発言禁止に関する情報
Information on unlooted items and The Postmaster.
Troubleshooting for unresponsive mouse cursor issues in Diablo III