Well, the idea is that a marriage issue cannot be resolved as per the external forum in the internal forum.
There tends to be a lot of confusion that if someone deals with things in the internal forum that it’s the same things as the external forum, and it’s just not.
I have only known internal forum cases to be used correctly in certain circumstances… For example, a woman who is 87 years old and her first attempted marriage was when she was 15 and none of the witnesses are living any longer, so there is absolutely no way to prove what happened. She exhausted the external forum completely by trying to get an annulment, but due to the complete lack of evidence, the Court could not get to moral certitude about the nullity of the marriage. This would be a perfect example of someone who has exhausted the external forum. There is truly NOTHING else that can be done.