store card 
noun
A credit card that can be used only in one store or chain of stores.The Commons Treasury select committee heard that 55 per cent of those with a store card were paying credit, as opposed to settling the balance, when their statement arrived....
- Instead, transfer your store card debts to a credit card offering 0% interest for an introductory period.
- The bank had sent out letters to cardholders saying that their store card would automatically be replaced by a credit card unless they had any objections.