To link your American Express Platinum or Centurion card to your Priority Pass membership, you must first "enroll" in the benefit through your Amex online account or mobile app. This is not an automatic process; you must navigate to the "Rewards & Benefits" section, select "Benefits," and then find the "Lounge Access" category to locate the Priority Pass Select enrollment link. Once you click "Enroll," American Express sends your information to Priority Pass. You will typically receive your digital membership card within 24 to 48 hours via the Priority Pass app, and a physical card will arrive in the mail within 10 to 14 business days. To activate the digital version, you will need to create a separate account on the Priority Pass website or app using the membership number provided in your enrollment confirmation. Remember that you must present your Priority Pass membership card (digital or physical), not your Amex card, to gain entry to the 1,300+ participating lounges worldwide.