We're pleased to say that there should be no issues now with processing MasterCard branded cards via the Square point of sale app. Thanks for your patience, and again we sincerely apologise for the inconvenience.
Posted 12 months ago. Apr 04, 2018 - 16:14 AEST
We are currently hearing reports of MasterCard branded cards declining when taking payment via the Square app. We are actively investigating and will report back when we hear more. In the meantime, we would suggest capturing payment via a different card or payment method.