What to do if you can't log in after patching WoW

What to do if you want to swap the names between two of your characters.

You can only have one copy of a unique item at a time

Troubleshooting loot problems with Corrupted Essence for the quest Darkheart Thicket: Fallen Power

WoW Token was misplaced or disappeared from inventory

For issues purchasing WoW Token with gold.

Information on error BLZHROPAY10200252

What to do if you didn't receive loot in World of Warcraft Classic

Information on error BLZSC2PAY10200252

List of restrictions of the loot trading feature in World of Warcraft