Hi Everyone,
We've been hearing that many of our clients are getting notices from their credit card company about needing to accept Mastercard series 2 cards (Mastercard's have traditionally always started with a 5) that are coming out and if they don't, there are big fines! We reached out to Mastercard and have been working with them to test with RMS. The short answer is that YES it will work but there are some caveats.
We've posted some of the additional details to our website - we hope it helps!