Is there any way of knowing is a credit/debit card has an EMV Chip, by reading the magnetic stripe. This way I could deny the payment via magnetic stripe and ask to the customer to insert the card via EMV.
How would it be possible or why it can't be done?
The service code on the stripe data will notify you it is a chip capable card and you should use this to prompt for card insertion. US is using the first digit of 2 or 6 to signify a chip card.
Service code values common in financial cards:
First digit
1: International interchange OK
2: International interchange, use IC (chip) where feasible
5: National interchange only except under bilateral agreement
6: National interchange only except under bilateral agreement, use IC (chip) where feasible
7: No interchange except under bilateral agreement (closed loop)
9: Test
No. There is no field on either track 1 or track 2 to indicate if the card is EMV capable. There is nothing that would prevent the card issuers from doing that but they haven't.
https://en.wikipedia.org/wiki/ISO/IEC_7813#Track_1
It is very possible that your merchant agreement with the major networks, prohibits you from requesting a customer use EMV chip even if you could identify them. It may sounds silly but the major credit card networks don't want anything which might disrupt the frequency that consumers use credit cards. This is the same reason banks have been dragging their feet on EMV so long that most of the third world has been using EMV regularly and US consumers are only getting EMV capable cards now. The merchant agreements are structured to ensure there is no friction that might reduce customer usage; "well that was a pain, maybe I should just pay by cash next time".
Yes, this is called the service code. Its the number in bold below, 101 can be swiped and does not have a chip, while code 201 will not allow a swipe unless the payment device is unable to accept chips.
Track 1:
B4000340000000502^John/Doe ^22251010000123000
Track 2:
4000340000000502=2225101123400001230
SC: Service Code. 3 digits:
Digit 1 (most significant): Interchange and technology:
1: Available for international interchange.
2: Available for international interchange and with integrated circuit, which should be used for the financial transaction when feasible.
5: Available for national interchange only, except under bilateral agreement.
6: Available for national interchange only, except under bilateral agreement, and with integrated circuit, which should be used for the financial transaction when feasible.
7: Not available for general interchange, except under bilateral agreement.
9: Test.
Digit 2: Authorization processing:
0: Transactions are authorized following the normal rules.
2: Transactions are authorized by issuer and should be online.
4: Transactions are authorized by issuer and should be online, except under bilateral agreement.
Digit 3: Range of services and PIN requirements:
0: No restrictions and PIN required.
1: No restrictions.
2: Goods and services only (no cash).
3: ATM only and PIN required.
4: Cash only.
5: Goods and services only (no cash) and PIN required.
6: No restrictions and require PIN when feasible.
7: Goods and services only (no cash) and require PIN when feasible.
From my understanding there are 3 tracks on a card.
Forget track 3 as it is not/hardly used.
Swipe and sign cards (without EMV) have just track 1:
%B1234567890123445^PADILLA/L.^99011200XXXX00000000?*
EMV cards have track 2, which is just a copy of track 1, but without the first and second name in the middle:
;1234567890123445=99011200XXXX00000000?*
