I have ordered for someone out of the country and when I received her dies I tested them and make sure they cut before sending them off to her. It was a win/win situation for the both of us. She was assured the dies would cut properly and I got a few die cuts pieces that I otherwise would not have had. If they did not cut properly I was willing to contact PTI to get the situation corrected.
Note: I did report to the person how the die cut - if she would need a shim or not. Also, it is possible what cuts fine in my machine may not cut as well in other machines - since as you know all die cutting machine are not the same.