| | Re: No Contact Letter & Exposure- do they prevent future cheating really?
The NC letter or email itself is just a piece of paper or electronic words. What it's really for is a definitive line in the sand between you and your spouse, a sign of his/her commitment toward your marriage and a contract that if he/she violates NC, there will be consequences.
No one can actually make your WS abide by the letter, the only thing you can do is enforce the consequences of said letter. In your case, a NC will do little for the OW living in the middle east, only that it says your WH will not contact her anymore. Most OM/OW don't believe the NC letter anyway most of the time, because they don't believe the WS actually meant it or that the BS made the WS send it. My fWW's OM didn't either, since he tried to fish twice after the NC private message.
So in a sense, they do prevent future cheating in that it tells your WS that you will hold them accountable for breaking NC and consequences will follow. But if you're not willing to enforce any consequences for breaking NC, then the NC is useless.