Handling M/chip fast transactions

Question

i'm doing m-tip transactions and I stuck on M-TIP05-USM.Test.01.Scenario.01f. According to M-TIP 2.0 Build 225 Test Definition Reference after offline pin verification next should be "The Issuer Script command is sent after First GEN AC - [RA120]". I'm getting "In Second GEN AC, the terminal requests an AAC - [R3]" Property: CONTACT.APDU(CLA=80,INS=AE)[2].COMMAND:BYTE.3.BIT.7-8 Expected: '00' Received: '01'

• and transaction is approved. Any advices?

Answer 1

On I'm getting "In Second GEN AC, the terminal requests an AAC - [R3]"

• When you do GEN AC, in reference control parameter, terminal will tell the chip what kind of cryptogram it expects. In your case it says terminal requests an AAC(reference control parameter is 0x00. If you were expecting an ARQC, it should have been 0x80 or if a TC 0x40( In case a CDA card, bit 5 also to be considered. Check the below picture from EMV Book 3). In your case you need to identify what caused your terminal to request an AAC( which mean terminal did not want to go ahead with the transaction).

May be you can get something from TVR, match the TVR against TAC - Decline (Terminal action code).

On and transaction is approved. Any advices?

• An AAC returned transaction should not be approved. How did you terminal consider the transaction approved.