This month Google added a new feature to the Ad Preview and Diagnosis. Now you can share the ad search preview with your clients. You just need to open the Ad Preview and Diagnosis Tool (1). Do a search with the criteria that you are looking (2) and then click on the button “share this search” on the right side, in the top (4).
Then you will have a url like this that you can share with your client. The client don’t need access to Adwords to see the result:Google Adwords Preview Tool