I do many PPI's on Volvo, BMW, Mercedes mostly. I only share what is found with the person paying for the service. If the other party wants to know what was on the PPI, the purchaser can share with them or not. It can sometimes be very uncomfortable when both parties are waiting in the office. But whoever pays for the service is entitled to the information and not the owner of the car. If a shop did that, they should be told not to do that in the future as the owner didn't pay for the service.