I am the selected scorer and measured for our team. I will be asked about close calls and will decide score, Like Steve, I’ll ask if obvious boules are okay and once agreed move them, then say something like these are tight shall we measure them, let them decide. I had a singles match where I was sure I was on for two but before I could get to head my opponent called one and moved boules. I call him out and claimed two to his utter ire. Not my problem, turns out he has habit of doing it and very few call him on it. Don’t understand player that need to cheat to win.