Shopify Payments is processing credit cards again. We are monitoring the situation.
Posted Dec 16, 2015 - 22:59 EST
Update
Shopify Payments is unable to process credit card transactions at this time.
We recommend that you install an alternate payment gateway as soon as possible to continue accepting payments.
Need help installing a payment gateway? Visit the Shopify Help Center.
Posted Dec 16, 2015 - 22:48 EST
Identified
We are seeing elevated checkout error rates when processing payments using Shopify Payments. We're investigating and will update shortly.