Editing Dark and Light Wiki:Administrators guide (section)

===Unblocking===
An IP address or registered user account can be unblocked via the [[Special:Ipblocklist|list of active blocks]]. Find the IP address or registered user account you wish to unblock in the list (you can enter the address or name in the "search" field to help you find the entry), and click the "Unblock" link displayed to the right of the block's expiry time.

This will lead you to a confirmation page. Enter the reason for unblocking (optional) in the "reason" field, and click "unblock this address" to remove the block. All unblockings are recorded in the [[Special:Log/Block|block log]].