"Bitfinex" already gives you some solution you should following the instructions.
If you're not from the "Cuba" but you have an activity traveling to cuba and you doing some activity login to your bitfinex account you should give them an explanation about your case regarding the activity of your account.
IMO, if you don't have any activity on cuba you should contact them first by option 1 before sending any document to them. Maybe you can get another solution about your problem from them.
I didnt get you exactly, what solution did they offered? I am Cuba citizen
Dont know if you do read up and understand the email was sent to you by Bitfinex or not but its clearly stated
If you are declaring you are not a Prohibited Person, please provide the following documentation:
• Please clarify: Your login history in Cuba.
• Cuba Visa, if you are not a Cubai citizen, along with the passport pages bearing Customs stamps.
• Scan or scans of your proof of address for any and all countries that you are considered a permanent resident of or where you are currently residing in.
Just follow on what they had instructed and you would be good. Theyre asking for some documentations that prove out your citizenship and your location.
They are the only ones who can solve out your problem not on any people on this forum..