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Check the list: LIST OF CA PUBLIC KEYS
Card Brand:
what What is the card Brand? Visa, MC AMEX, Discover, DIscove etc. Set the filter accordingly
Test/Live:
Is it a test card or a live card? Test cards will usually say that they are test cards (printed on the card). Live cards do not. Search the page for "Test" or "Live". Find the first match that is NOT expired. This is very likely the CAPK that is needed
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