Examples of U.S. Dollars rejected by Cuba

Examples of U.S. currency refused in 2015 by Cuban banks and money change "CADECA" booths:
ink stain
torn bill
ink stamp markings
Bills will also be rejected for ANY handwriting, or markings from a pen, that is visible
Not exactly sure why this bill was rejected - but it shows it is wise to go to Cuba with bills in the best condition
you can get them (they do not need to be brand new - although new will always be accepted).
In Cuba you can change bills of any denomination, although we usually change only bills that are $20 or larger
- but regardless of bill size you get around .88 "CUC" for every U.S. dollar.
The rule of thumb is take $200 cash per day (although if you have pre-paid in the U.S. with CubaToDo.com for
your hotels, transfers, excursions, etc. this is probably much more money than you would ever need).
REMEMBER: even as U.S. credit cards are starting to be accepted in 2015 - expect the very few places that
accept them, will often be experiencing a "broken machine" the moment you want to use your credit card.