Barclays USA Activate Take a few minutes of your busy day to activate your Barclay credit card. You must be 18 years of age or older and legally resident in the United States. Visit www.barclaysus.com/activate to start the process. Once the Barclays credit card has been activated, the user can set up online access to … Continue reading BarclaysUs Activate: BarclayCard Activate Login – 2023 Guide