We couldn't. Terry and I, I mean. When we--when we were in service. If I tried to write a PM to Terry, the journal would add Harry and Professor Carrow and it would remove Terry altogether.

But then we weren't free at the time. When Mr Weasley freed Terry, then we could PM each other but Harry's name was still on it until he freed me.

So maybe that's only because we're mudbloods. But I think this might be something new at that.