I think they were specifically referring to “CD” account, which generally speaking pays more interest than a standard savings account but requires a commitment where you cannot access the funds for a fixed amount of time 6 months, 12 months, etc)

To the best of my knowledge, although the U.S. makes “lease payments” on the land the prison sits on, they do not have the authorization of the Cuban government, which in turn has not cashed those checks.