I've read so much but I'm still a little nervous so please inform me on this subject. The obvious is that I know the American laws about visiting and spending US dollars. I've heard that Cuba does not mark your passport, to pay cash for everything in Euros or Canadian and to find a flight from Canada, Mexico, Nassau or other Caribbean location. My concern is about returning to the US as I point out what I've read: the OFAC has not investigated anything like this in years and the worst that will happen if you are overcome with guilt and start blurting where you've been the fine is $250 to $1,000 with no prosecution nor criminal record, kind of like a parking ticket. All responses are welcome but Americans are preferred to tell me of any first hand knowledge and experience.