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American Express Add-On Credit Cards

FAQs:

The number of free supplementary credit cards is different under different cards. With the AmEx Platinum and AmEx Platinum Reserve Cards, you can get up to 4 free add-on cards and 2 free add-on cards under all other credit cards.

The interest rate on AmEx supplementary credit cards is 3.5% per month.

The minimum eligible age to apply for AmEx Add-On Credit Cards is 18 years.