Maurine- Depends on the country you go to. Belize was one that raised concern for the CC company... and for some reason we had to call the company for a charge in Cozumel once, but that was a jewelry charge so I did not mind verifying it. Citibank wanted dates,times and places for our entire Eastern Med cruise. It just depends.
But try to go to China and make a charge without letting them know you are going there and see if you are successful (you won't be)
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise, Magic 1/14
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013