Grant the OP a binding close as duplicate vote
25851
New UI encourages askers to confirm or dispute duplicate votes
19135
How to see the correctness of close/reopen votes?
107015
Make it clearer when looking at a question if I've already voted to close it
23532
Add close reason as a comment after Vote to Close
130688
Place a bounty to reward an answer on a duplicate (closed) question
22831
Changes to "close as duplicate" (part deux)
108212
Why are people so trigger happy with close as duplicate?
13709
Should flagging a question for closure prevent close-voting?
77018
Idea behind "Your vote is now locked in unless this answer is edited"
88247
Is it possible to get an Edit notification on questions that I Vote-to-close?
33657
Ability to change close reason before it gets closed
129585
Can multiple edits send an [on-hold] question to Reopen queue more than once?
52527
Locked votes can be changed by editing a post
158092
I'd like to get a notification when a question that I've voted to close (but isn't closed yet) is edited
21636
Let me edit a post in the close review, then vote to close it
116380
Should dupehammer wielders use their powers to wipe obviously incorrect close-as-duplicate votes?
40811
Can we have the ability to retract a close vote before it closes?