Troubleshooting steps for if you can't claim a gift
What to do if you can't reset your password in the Blizzard website
How rewards from quests work in Hearthstone
Recovering a Battle.net Account when the email address has been forgotten
How to resolve being unable to log in due to this error
What to do if you have trouble with the captcha
Information on error "Your friend isn't eligible to receive this"
Information on what to do if you can't locate your Hearthstone account details.
What to do if you can't get the Battle.net App installer downloaded correctly.
What to do if you can't save your communication preferences in the Account Management page.