When you see a question that has been cross-posted on multiple Stack Exchange sites, do two things:
- Add a comment pointing out the cross-post and describing that our policy forbids cross-posting. Here is a candidate template you can use:
[Also posted on ](). Please [do not post the same question on multiple sites](http://meta.stackexchange.com/q/64068). Each community should have an honest shot at answering without anybody's time being wasted.
Also posted on Panda Stack Exchange. Please do not post the same question on multiple sites. Each community should have an honest shot at answering without anybody's time being wasted.
- Flag the question for moderator attention, with custom reason, and indicate to the moderators that the question has been cross-posted and should be closed here. Here is a template you can use:
Cross-posted on blah.SE (see comments), which violates SE rules. Please close this copy.
It's useful to post a comment on both copies. Pick one of the copies to flag (e.g., if it is cross-posted to X.SE and Y.SE and seems like a better fit on X.SE, flag the copy on Y.SE for moderator attention).
You can also vote to close on either or both sites, if it is meets the criteria for closure on that site.