The good news is that MST is still considered a card present mag stripe transaction with the associated rates with no required changes by any party. When liability shifts in Oct 2015 in the U.S., there are three basic scenarios:
- If the issuer is issuing a dynamic track via LoopPay, the risk is effectively gone so liability shift is mute for that card.
- If the issuer issues a 201 Chip card that is self provisioned by consumer and MST transmits into a mag only terminal, then the merchants bares the risk.
- If the issuer issues a static 101 track data transmitted by MST, into either an EMV or magnetic only terminal, the issuer bares the risk.