I disputed a charges one time with AM. AM sent copies all of my emails via my AMX statement. I had to be careful to make sure my wife wouldn't read them!
name – withheld (sorry)
Ashley Madison says they're all about discretion and I've never heard that they've violate this promise except in this case when someone disputes charges (can you blame them?). When you make an Ashley Madison purchase, your credit card will be discretely billed which makes it hard to get caught through your statement. When you dispute a charge, the Ashley Madison has the opportunity to prove you made the purchase. If they can prove to the credit card company that you made the charges, the credit card company will send you proof showing why they will NOT reverse the charges.
In the above case it looks like the guy tried to dispute a charge he made, and got proven wrong. If you're married and trying to date, it's best to err on the side of discretion and avoid getting caught. Don't dispute the charges.
I'm not sure how anyone can expect to have AM not fight the disputed charges. If you are going to join a married dating service like Ashley Madison, lie to your partner or spouse but don't try to SCAM Ashley Madison because you significantly increase your chances of getting caught.