A 3DS check may end up with one of the following outcomes.

3DS check successful
fz.sca.success event is triggered by fatzebra.js. If you own your own payments form and use the verifyCard method of fatzebra.js to perform 3DS checks, 3DS result data will be provided in the fz.sca.success event payload. Using this 3DS result data in your Purchase or Refund API call will qualify that transaction for liability shift.
Please note: The edge case is when the enrolled field (ver) comes back as 'N' (3DS success - Not Enrolled), which means "No, Bank is not participating in 3-D Secure protocol". If the Enrolled value is equal to N, then the Consumer is NOT eligible for Authentication (No liability shift).
3DS check unsuccessful
fz.sca.error event is triggered by fatzebra.js. An error code will be returned in the event payload indicating the reason for the error. This could be due to the card issuer not support 3DS2 or if the cardholder was unable to verify their card when prompted with a 3DS challenge flow (e.g. they entered the wrong one-time pin that was sent to their mobile device).
Server Error or timeout.
fz.sca.error event is triggered by fatzebra.js. No error code will be returned in the event payload. In this event we recommend that you prompt your users to retry the 3DS check/payment.

Test cards

FatZebra provides a number of test cards to simulate various 3DS scenarios in the Sandbox environment. Each of the following card numbers will simulate a predetermined outcome:

Successful 3DS2 check

Scenario	Cards
Successful frictionless authentication Cardholder being authenticated by their Card Issuer -- Liability shift	Visa: 4000000000001000 Mastercard: 5200000000001005 Amex: 340000000001007
Attempts processing frictionless authentication Cardholder is enrolled in 3DS however the Issuer is not supporting the program, resulting in a stand-in authentication experience -- Liability shift	Visa: 4000000000001026 Mastercard: 5200000000001021 Amex: 340000000001023
Successful step-up authentication Successful OTP challenge -- Liability shift	Visa: 4000000000001091 Mastercard: 5200000000001096 Amex: 340000000001098

fz.sca.success sample payload

{
  "message": "FatZebra.3DS: 3DS success - Successful Frictionless Authentication",
  "data": {
    "cavv": "xxx",
    "par": "xxx",
    "sli": "xxx",
    "xid": "xxx",
    "ver": "xxx",
    "directoryServerTxnId": "xxx",
    "threedsVersion": "xxx" 
  }
}

Unsuccessful 3DS check

Scenario	Card	Error code
Unsuccessful enrolment check Enrolment failed by card issuer -- No liability shift	Visa: 4000000000002446 Mastercard: 5200000000002037 Amex: 340000000002732	002
Unsuccessful frictionless authentication Authentication failed by card issuer without challenge -- No liability shift	Visa: 4000000000001018 Mastercard: 5200000000001013 Amex: 340000000001015	004
Unavailable frictionless authentication Authentication is unavailable from the issuer at the current time. -- No liability shift	Visa: 4000000000001034 Mastercard: 5200000000001039 Amex: 340000000001031	003
Rejected frictionless authentication Authentication rejected by the issuer. -- No liability shift	Visa: 4000000000001042 Mastercard: 5200000000001047 Amex: 340000000001049	005
Authentication not available on lookup Unable to verify 3DS enrolment status with the issuer due to system error. -- No liability shift	Visa: 4000000000001059 Mastercard: 5200000000001054 Amex: 340000000001056	002
Server Error -- No liability shift	Visa: 4000000000001067 Mastercard: 5200000000001062 Amex: 340000000001064
Timeout -- No liability shift	Visa: 4000000000001075 Mastercard: 5200000000001070 Amex: 340000000001072
Bypassed authentication This is related to a feature that is currently not available. We will look at providing merchants the ability to configure rules to determine whether authentication is required for a transaction. -- No liability shift	Visa: 4000000000001083 Mastercard: 5200000000001088 Amex: 340000000001080	001
Unsuccessful step-up authentication Unsuccessful authentication due to failed OTP (one time password) challenge. -- No liability shift	Visa: 4000000000001109 Mastercard: 5200000000001104 Amex: 340000000001106	006
Unavailable step-up authentication The card holder is enrolled for 3DS, but authentication is not available with that issuer. -- No liability shift	Visa: 4000000000001117 Mastercard: 5200000000001112 Amex: 340000000001114	007

fz.sca.error sample payload

{
  "errors": [
    "FatZebra.3DS: 3DS error - Rejected Frictionless Authentication"
  ],
  "data": {
    "errorCode": "005" 
  }
}