Publishers can check that Skimlinks is working correctly by right-clicking on a link to a merchant site and selecting 'copy link address'. Open notepad and pasting the result into the address bar. If the link has been correctly affiliated it will start with the string:
You can also check using the redirect path chrome extension after clicking on a link you expect to be redirected as it will show all the the urls redirected through.
Another method is to check the Performance section of the Publisher hub to see if clicks are affiliating as seen below:
Any one of these methods can be used to show the link is being redirected and that Skimlinks is working correctly.