PayPal, for instance, which will allow transactions that mention the words "bomb" or "cocaine," will block any transaction with the word 'Cuba' in it. (When a TIME reporter tried to send another user in the U.S. $1 with the note "Cuba Libre" on Nov. 17, PayPal immediately restricted their account and put the transaction under review.) Paypal's terms of service note that its services may not be used by residents or nationals of "any country subject to United States embargo or UN Sanctions."