A traveler's cheque (also traveller's cheque, travellers cheque, traveller's check or traveler's check) is a preprinted cheque for a fixed amount. The person who buys it must sign it and then sign it again when he "cashes" it. It is a good way for a traveller to take money when going on holiday. If a traveler's cheque is stolen it can be replaced so long as the person still has a receipt to prove that he bought it.
Traveler's cheques were a large part of the business of American Express. Since 2005 the American Express have been issuing "American Express Travelers Cheque Cards". These can be used in stores like a credit card.