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How to Activate a Replacement Costco Mastercard

Call our automated activation system at 1-800-945-1000 to activate your new card. Be sure to have both your new credit card and your PIN ready before you call. Your PIN will remain the same. Your card will be ready to use once you’ve successfully activated it.

Here are some things to keep in mind when you get a replacement card:

  • Update all recurring payments with your new account number
  • If you make payments to your Capital One card through your bank’s online banking service, update your account number

If your card is being replaced because it’s been damaged but you still have it, you’ll receive a new card with the same number on it. In this case, no activation is required.