An acceptance mark, in the world of credit cards, is a logo or design that indicates that a merchant

Merchant

A merchant is a businessperson who trades in commodities that were produced by others, in order to earn a profit.Merchants can be one of two types:# A wholesale merchant operates in the chain between producer and retail merchant...

 accepts one or more credit card types. Common uses include decals and signs at merchant locations or in merchant advertisements. The purpose of the mark is to provide the card holder with information where his or her card can be used. An acceptance mark differs from the cards product names (such as American Express Black card

Centurion Card

The Centurion Card, known informally as the black card, is a charge card issued by American Express.The card is available in select markets, mainly the United States, Canada, Mexico, Europe, Taiwan, Korea, areas of China, Hong Kong, Japan, Australia and the Middle East...

, Eurocard

EUROCARD (payment card)

Eurocard was a credit card, introduced in 1964 by a Swedish banker in the Wallenberg family as an alternative to American Express.-History:In 1965, Eurocard International N.V. was established, based in Brussels, as a not-for-profit membership association of European banks. Its operational entity...

), as they show the group of cards accepted. An acceptance mark corresponds to the same mark being shown on the card.