IIRC... once the player sign and turn in their scorecard over in that tent after the round is final. Otherwise the player would be DQ because he signed a lower score on that hole (if a penalty occurred). I believe, in this case, that the player would still win because PGA will be like, "Yes, this player made a penalty on this hole, but nobody caught it before he turned in his card so the score stays the same." A lucky break type of deal unless they can somehow prove the player knew of the penalty and didn't account for it then he's DQ and lose the win. Golf is weird in that players are in charge of penalizing themselves. So if the player signed a scorecard with a score lower than what it should be they would be DQ. The PGA doesn't have to prove that the player didn't know it was a penalty. The players are supposed to know the rules. They can't claim ignorance. What they would do is tell the player that someone said they should be penalized and adjust their scorecard before they turn it in. In a major tournament, the type of people that live for that horsefeathers are all watching and will call in immediately. That's the difference with the Lexi Thompson situation- not as many people are watching some random women's tour event. Yes, the players are supposed to know the rules, but there's so many rules. There's a ton of stupid or random rules/penalties that hardly anyone know about. Then they add, change, and remove rules every year so it's hard to keep track. It's why we keep seeing Lexi, that Anna girl at US women open, Dustin Johnson, Tiger a few years ago, etc all hit with penalties that they didn't even know or notice they committed. And these people do golf for a living. And 99% of the penalties that are called in are reported to the player that day and they adjust their scores then. What soccer was asking is what if it happened AFTER he's done with the tournament and the card is already turned in? I know it was Lexi's 3rd round when it happened and was penalized in the final. She got 4 penalty strokes (2 for the penalty then 2 for incorrect scorecard- so I guess that somewhat answer that question). She was still playing at that time. LPGA also fumbled this as that penalty should have not took that long. She should been told before her final round that she was going to be penalized and it's on her 3rd round score instead of being told on like the 13th hole or whatever. Why would you wait that long? Then again, I'm in the camp that nobody should be able to call/email in for this stuff. I'm fine with PGA having like an official group where they watch the cameras to look for that kind of stuff, but no random Joe blow should be able to call in.