I came across an Ebay store which has a counterfeit graded coin listing

[jr_fab]

I wanted to report this to Ebay, but I can't find any information on how to do so. Does anyone know how this should be reported?

[kathiec]

Ebay never takes action on one report that something is counterfeit. They can't hire experts in every single thing sold on the site. So your report would be you saying the coin is counterfeit and the seller saying it's not. Ebay knows neither of you, so they have no idea who's right. What they do have is a Money Back Guarantee that protects the eventual buyer of that coin. 

[simba6]

In every listing on the right side just above the item number there is a report this listing link to click.

However, unless you purchased one and it was fake, don't expect eBay to do much.