Which credit-card company used the slogan “Don’t leave home without it”?

American Express used the slogan “Don’t leave home without it.” The line promoted the idea that travelers should carry an American Express card when away from home, especially for access to credit and travel-related services.

The slogan was introduced in 1975 and became strongly associated with actor Karl Malden, who appeared in American Express advertising for many years. His television commercials presented the card as an essential item, using a direct warning that was easy for audiences to remember.

American Express began as an express-mail business in 1850 and later became known for financial services, charge cards, credit cards, and travelers’ cheques. Its travel heritage helped give the slogan particular relevance during its main campaign period.

The phrase is sometimes remembered as a generic travel warning, but its advertising origin belongs to American Express. It is separate from the company’s earlier “Don’t leave home without it” campaign imagery featuring Malden’s security-focused persona.