How card pack opening rules work in Hearthstone

What to do if you have a Season of Discovery rune that you cannot use or delete

Information about being unable to delete the Delver's Dirigible item if your account already has the mount.

Information on how the redundant card reroll system works in Hearthstone

Got the same Legendary item on the same character twice

What to do if your achievements are displayed incorrectly, missing, or their progress was reset with patch 10.2.5

What to do if you have duplicate rings from gaining reputation with the Scales of Sands questline.

Can't complete the quest Shaping Fate. Getting duplicate item error.

Can't complete the quest The Darkmoon Faire. Getting duplicate item error.

You cannot loot more than one of the same Unique item