Not if the other person doesn't have camper contact.I'm amazed by the number of folk who can't see the advantage of using the reference number. In my trip reports if we stay at a CamperContact aire I usually give its number as CC1234 or whatever it is. Then others can easily find it.
I knew there was a reason I preferred CC over P4N - although P4N is useful sometimes.
But Robert has always used that and spoke of it as the holy grail so why is he now trying to change.