I was asking a someone if they would mind leaving feedback for a swap that we had on a swap thread. It requests a URL and I looked up what to use since there is no sale page for it. I read that a review can be given for a swap and just to use the swap URL for it. It is saying invalid author though. Am I not understanding what directions to give? Thanks. You can still leave feedback on a side swap that does not have a forum-specific URL. IE: Someone offers eggs in the paypal hatching swap and someone else (other than you) claims them. You can still leave that URL as your feedback URL since those are the eggs you purchased or swapped.